Xt550 trike conversion build thread [Archive]

plevib

11-06-2017, 11:03 PM

OK I started a project last year that never got too far off the ground. The goal was to use my heavily modified 1982 xt550 with 2003 yz450 suspension and this pile of things to add a 3rd wheel! With inspiration from kasey's conversions I collected a 04 yzf swing arm, some vtx triples, and a 200x hub and wheel. But alas, the lathe at work died and I couldn't go any further than a quick mock up in the rear. So I put the bike back on 2 wheels for the summer. I picked up a wr500 and my dad has basically claimed the 550 so I'd feel bad turning it into a trike on him haha.... I'd pretty much abandoned the project as others fell in my lap
https://uploads.tapatalk-cdn.com/20171107/f318246fd1a5c35230b0337b060c886b.jpghttps://uploads.tapatalk-cdn.com/20171107/c48e84ea9fd307b30e479fa35fbe6be2.jpghttps://uploads.tapatalk-cdn.com/20171107/2a534404eec9c9af3d67ab1055c387a0.jpg

Sent from my SM-G900V using Tapatalk

plevib

11-06-2017, 11:06 PM

But thanks to these two screaming deals this project is back on the roster! I picked up this lathe for 500. Then low and behold, the next weekend a 1982 xt550 popped up for 300 bucks! I ended up giving him 200 due to a damaged case and broken shift shaft. The bike was wrecked, plastics are shot, rear wheel is bent, handlebars, kickstand ect... but she is complete and looks like she'll run without too much effort!

https://uploads.tapatalk-cdn.com/20171107/bd5a515feb46cd2eb9d215d9a73953b7.jpghttps://uploads.tapatalk-cdn.com/20171107/bde39478a60a4b8233608f1ed6202613.jpg

Sent from my SM-G900V using Tapatalk

plevib

11-06-2017, 11:21 PM

Front setup plan:
I have 02 yz450 forks on order and vtx triples prepped for the forks. I'm going to play with a yfz front hub to see about using that as the front setup. Reason being it will be easier to make work, brake parts are cheap and plentiful, and most of all it will allow me to use a stock yfz front wheel (and rear because of swing arm choice). This means cheap wheels and plentiful tire choices! Yfz front caliper with custom caliper bracket. However, if I don't think it'll work well or be strong enough then I'll have to fall back on modifying the 200x hub and brake setup.
Probably tri z front fender and headlight shroud with led lights (handily this bike has a DC lighting coil already so I won't even have to touch the wiring)
I do have a question here, should I try to turn the forks and make them trailing front axle instead of leading? I have a fuzzy grasp of how it'll affect handling and it seems that trikes are trailing so I expect it is the way to go

Rear setup plan:
2004 yfz rear swing arm, linkage and shock, brakes ect. I know this is a reasonable easy swap as I have already done this on the other bike. Major obstacle is frame modification. But again this allows Me to buy a set of wheels and tires for a yfz and bolt them on without issue.

Frame mods required:
First of all I'll have to make an adapter for the frame with the new shock. I've done this on the black bike (http://advrider.com/index.php?threads/1982-xt-550-rebirth-carb-suspension-and-brake-upgrades.1088470/) with great success! Been beating on it for 3 years without any issues and great performance. I will probably make a few shock mounting points so I can play with rake angles and ride height and stuff. I know nothing about proper frame geometry so I'll try to copy my 84r to get it close and I'll dial it in from there. Pointers are welcome!

Have to drill out the swing arm bolt and make custom mounts for foot pegs. Again I'll use yfz foot pegs (and possibly heel guards or nerf bars) for parts availability and price.
I will build a custom sub frame so the 84r fender and seat that I'm using fits properly and gives me a ride height that I'm happy with. I will also likely put the seat on a hinge as the rear kick on the starter would mean I'd have to take the seat off to start it (which is annoying. Biggest irritation of my 500x build haha)

Name:
I don't know what I should call this. I'm not a yamaha trike guy so I don't really know their designations well. I would guess 550dx. At 38 hp stock and disc brakes and great suspension it'll be able to get around a track or the woods fairly fast. But it's 4 stroke and won't exactly be a racing model so tri-z doesn't seem right. Although the dx seemed more like Hondas sx line, ie more trail/work not meant for high speed or airtime. The name is clearly a crucial part of the build.

anyways forks will be in by the weekend so I'll probably start playing with the front setup. Winter is setting in pretty good so I've got around 6 months here in ND to get it built. But hopefully progress will be fairly steady

https://uploads.tapatalk-cdn.com/20171107/d32dbda9b87200e7eb9be2b106e1e662.jpghttps://uploads.tapatalk-cdn.com/20171107/2e3c7f4f2f7c682ee782375ff7c90264.jpghttps://uploads.tapatalk-cdn.com/20171107/e15b27d8a96e0a2f74d53ebed2bcc840.jpg

Sent from my SM-G900V using Tapatalk

350for350

11-07-2017, 10:29 PM

I liked your 84 atc500 project and am looking forward to this one now. Maybe call it a Tri-XT550?

plevib

11-08-2017, 12:00 PM

I liked your 84 atc500 project and am looking forward to this one now. Maybe call it a Tri-XT550?Thanks! I've the the 500x torn apart right now for a little reworking and lots of engine upgrades. Should be a monster when it's done! http://www.3wheelerworld.com/showthread.php?t=177712https://uploads.tapatalk-cdn.com/20171108/7f4c67a7877a8843dc1d42430b78e188.jpg

Sent from my SM-G900V using Tapatalk

350for350

11-08-2017, 10:07 PM

So what are you doing to upgrade the engine? I'm curious since I have a XR500 plus an extra XR500 engine that came with it. The spare is SLOWLY being built with an EdCo 600 kit.

plevib

11-09-2017, 12:13 PM

So what are you doing to upgrade the engine? I'm curious since I have a XR500 plus an extra XR500 engine that came with it. The spare is SLOWLY being built with an EdCo 600 kit.It's all at the end of that build thread I posted. Still 500cc for mine, 12:1 wiseco, full port for 42mm carb and 28mm header tubes, clutch springs, oil cooler, remove counter balancer, xr flywheel, ect.... should be a beast haha. Got a build thread for yours?

Sent from my SM-G900V using Tapatalk

350for350

11-09-2017, 09:33 PM

No. As of right now, I'm planning on keeping it in the bike. I will have the stocker going so I can ride it next summer. After the big bore is built and installed on the bike, who knows?

plevib

11-10-2017, 10:49 PM

Woohoo! Moving right along! Got my forks in and on the triples. I turned 1mm off the end of a xs1100 rear axle to make it fit the clamps. And I used a 04 yfz front hub. On the hub the inner bearing is 20mm i.d. but the outer is 15mm i.d. I pulled it to test fit on the axle. The bearing I removed is 15 i.d. 35 o.d. 11 width. Some cross references and googling and I found that blaster inner bearings are 20 i.d. 37 o.d. 9 width. So I'm gonna turn 1mm off the hub to make it fit. ("What if you, being inexperienced on a lathe, wreck said hub," you may be asking. Ah, see I bought two for just that reason!) Prime shipping so it should be here Wednesday

I have a front wheel on order as well as some 20mm i.d. tubing. The tubing is coming from China so..... I'll probably just use some random pipe to make temporary spacers.

Rear shock is also on order. I will start tearing the bike down as soon as I button up the dang sled taking up all the room in my garage hahahttps://uploads.tapatalk-cdn.com/20171111/31aa2aec7755008fdab9b00fdd66c6ba.jpghttps://uploads.tapatalk-cdn.com/20171111/dfb6a9f2b0731ab5625f9bb3cd993e91.jpghttps://uploads.tapatalk-cdn.com/20171111/1f7196c5445813c6ea54538a5b47fe4b.jpg

Sent from my SM-G900V using Tapatalk

big specht

11-11-2017, 02:14 PM

Lathes and mills are a handy thing to have around when cross breeding parts lol

plevib

11-14-2017, 10:27 PM

Pretty!https://uploads.tapatalk-cdn.com/20171115/015aa789f14d69260eb1b922efa80a14.jpghttps://uploads.tapatalk-cdn.com/20171115/8358791b9f53ebcc10838079ffdbc51b.jpg

Sent from my SM-G900V using Tapatalk

plevib

12-08-2017, 09:57 PM

Some pictures of the donor bike. There is a hole in the case by the shifter shaft (knub...) which is a big reason why the bike was 200 bucks haha. Also milled the hub to use a blaster bearing. Time to bolt the front on for a mock up!https://uploads.tapatalk-cdn.com/20171209/18ddc56f698faed57e7fe05d2d2e5a2a.jpghttps://uploads.tapatalk-cdn.com/20171209/a969e4e1def13d8d635cd2be66300cf7.jpghttps://uploads.tapatalk-cdn.com/20171209/845181bdd47bf29a1e234d3c5408d740.jpghttps://uploads.tapatalk-cdn.com/20171209/8890f581188b3ac289e7bbddcf2693d4.jpghttps://uploads.tapatalk-cdn.com/20171209/d9fa6674292033ca10426fb77e773431.jpg

Sent from my SM-G900V using Tapatalk

sledcrazyinCT

12-08-2017, 10:13 PM

Your cranking right along with this project....Excellent!

plevib

12-08-2017, 10:38 PM

My first yamaha big wheel! Haha... Now I'm getting freaking excited! This thing is gonna be a monster! A tall monster haha..... I'm 6 4 and 240 so that's not such a bad thing thoughhttps://uploads.tapatalk-cdn.com/20171209/cf0a8b8197489709202cf50a7fa186af.jpghttps://uploads.tapatalk-cdn.com/20171209/1d63528c56e726d59d1006e1a9aee239.jpg

Sent from my SM-G900V using Tapatalk

plevib

12-09-2017, 04:03 PM

Continued the bike tear down. Found a little redneck engineering as well as a very nice surprise! Every fellow xt550 owner will tell you the stock carbs are utter garbage. Cable primary and vacuum secondary (which didn't even work from the factory). The bike would bog after half throttle no matter what you did. So on my first 550 I tried two vm28's, which worked very well but was very hard to fit and caused a heavy twist. My suspension modifications allowed me too use a grizzly intake and a 38mm mikuni which is perfect! Easy to tune, light twist, again hard to make fit but ultimately it a REALLY woke my old thumper up! I was planning on doing that same setup on this trike conversion, until I noticed that someone has already swapped out for a dual keihin! (I have no idea what machine they are from) so that saves me like 150 bucks and I'm fairly confident that I can get these carbs working great on this bike. This setup even retains the handle bar choke, which is a nice addition!

Should have the rear swinger mocked up very soon! https://uploads.tapatalk-cdn.com/20171209/1503c017face2434ced6b62ad3ab8e1b.jpghttps://uploads.tapatalk-cdn.com/20171209/b0a488a61240f13e423dcfecf1c5e097.jpghttps://uploads.tapatalk-cdn.com/20171209/229d7a048a568cfb36ffec758597a7df.jpghttps://uploads.tapatalk-cdn.com/20171209/432c43744644ec20e27a924b8acf9e03.jpghttps://uploads.tapatalk-cdn.com/20171209/ed6ee514e074aa4ee0b5c32a0079c9bd.jpg

I'm tempted to plug the hole in the case just to see if this beast will run.... :D

Sent from my SM-G900V using Tapatalk

plevib

12-09-2017, 04:40 PM

Mwhahahttps://uploads.tapatalk-cdn.com/20171209/4b994b415044bad1ac9ff75021c9010c.jpghttps://uploads.tapatalk-cdn.com/20171209/a15c952a31923ca445c3f6011473ca16.jpghttps://uploads.tapatalk-cdn.com/20171209/d86cf47c49c6103e801aa85cd471d0e7.jpg

Sent from my SM-G900V using Tapatalk

plevib

12-09-2017, 05:16 PM

Hah first guess propping it up with a random pipe and the rake is only .6 more than my 84r! Wheelbase is within a half inch, and I think with a little modification I can even get the seat hight really close (although I'll probably give it a couple inches more than my 84r) the handlebars would be 4ish inches taller, but I'll just use dirt bike bars to help make that up. I'm pretty shocked at how close all the geometry is! I thought for sure I would have to scale everything up a bit. Anyhow time to go buy some square stock to make a new shock mount! https://uploads.tapatalk-cdn.com/20171209/ed4b1dfc2dd5ed2b2a28fca5171afe1b.jpg

Sent from my SM-G900V using Tapatalk

plevib

12-10-2017, 09:52 PM

Rear suspension getting really close! Like my two piece linkage bracket? ;) in the last linkage conversion I did the bolt wasn't removable without cutting the bracket off so this go round I thought up a better way. I also used square tubing to extend the spine which is much much easier to work with than the pipe I used before. Now I'll figure out where the shock lands and cut a notch in the square stock. I've also decided that I'm going to extend it to that cross piece in the sub frame so the spine will be as strong as possible. I'll do that when I lower that sub frame.

Woohoo!https://uploads.tapatalk-cdn.com/20171211/25b089943e0b1c6113f3f9e99258246d.jpghttps://uploads.tapatalk-cdn.com/20171211/a986d21e31846266f47b81c6e8dc4f5d.jpghttps://uploads.tapatalk-cdn.com/20171211/2133cf02fd54cf54c04f0b17eddfc7e1.jpghttps://uploads.tapatalk-cdn.com/20171211/792c42301c5bcc17ee823b3a3e112e36.jpghttps://uploads.tapatalk-cdn.com/20171211/6f49b18e41ea811417c162960c1d0161.jpghttps://uploads.tapatalk-cdn.com/20171211/75b67640c2e1332d57cdd0565b401ca3.jpg

Sent from my SM-G900V using Tapatalk

plevib

01-01-2018, 10:24 PM

Didn't do a darn thing on this project during the holidays. -27 makes it hard to motivate yourself to work in a cold garage...

But today it was only -9 so I figured I'd take advantage of the nice weather ;) haha

I decided to redo the front hub and did dual bearings. So the front hub has 4 bearings and a spacer in it now https://uploads.tapatalk-cdn.com/20180102/6b732ac8eff51b166695a281da834874.jpghttps://uploads.tapatalk-cdn.com/20180102/c52dfb4554bc753dd9eab1074d2d6f89.jpg

So the front is ready to roll. Brake is all that's left and that should just be a custom caliper bracket to meet up with the rotor (I know, I know, it's kinda small..... Gotta use the one God gave you!)

kevin

01-03-2018, 10:51 AM

Nice build! Was there any work that had to be done to make those triples work with the yz forks?

plevib

01-03-2018, 01:54 PM

Nice build! Was there any work that had to be done to make those triples work with the yard forks?Not too much. I made shim for the top triples with sheet aluminum to take up the 2mm difference and I had to use Emmery cloth and a drill (and a lot of time) to shave the botton triples out 2mm. If one had access to a mill that would be a massive time saver. Also it'll require custom fender mounts and a custom bump stop, but it beats how much custom triples are!

Sent from my SM-G900V using Tapatalk

plevib

01-27-2018, 10:49 PM

Important update! Got a front fender mounted! Major engineering hurdle...... nos maier for 40 bucks!

Oh also got the bottom mount for the linkage finished and the top mocked up (don't worry, I know the top isn't strong enough yet)

The wife is out of town so tomorrow may end up being productive if I get my butt off the couch! https://uploads.tapatalk-cdn.com/20180128/714f9b55fc861eed328bb98a10e54ec7.jpg
Some wider hubs for the rear are on order..... she's way too narrow, even for a trail machine. Should be about 2.5 inches wider and I may get spacers if I'm not happy with that.
https://uploads.tapatalk-cdn.com/20180128/7a67a7cdc221b5aab2e7b9370fbd0793.jpghttps://uploads.tapatalk-cdn.com/20180128/91fa781a7372444925131bde9b6b53ef.jpghttps://uploads.tapatalk-cdn.com/20180128/db2e985beea3b3edb9c36149ef5e4739.jpghttps://uploads.tapatalk-cdn.com/20180128/c112aeeebfc4747e92a7fc0874b27b11.jpghttps://uploads.tapatalk-cdn.com/20180128/b3ecbe8a9aec05c9984895d977a7de65.jpg

Sent from my SM-G900V using Tapatalk

plevib

02-10-2018, 10:41 PM

6th straight week of -10 degrees.... and not supposed to let up so i decided I'll just have to brave the cold. https://uploads.tapatalk-cdn.com/20180211/0762413a256b7d8aed08b59adcca84ee.jpghttps://uploads.tapatalk-cdn.com/20180211/8247a5bb5162231b106a394600d2ff31.jpg
Picked up some wider hubs for 40 bucks. They are ugly (much black paint will be used on this trike) but the stance is much much better. Gained 2 inches but it makes a big difference ;)
https://uploads.tapatalk-cdn.com/20180211/e3b24e1cfcfe24ac824ffc5188676f59.jpghttps://uploads.tapatalk-cdn.com/20180211/fbfe47b9971ede38219afdc2fcdab66c.jpg
Anddddd..... well.. the tank is a goner. After lots of rust therapy and some bubble gum patching I found. ... lots and lots more rust pinholes. So, I've given up on this tank. I know when I've been beat. A glance at fleabay and I found a dented but no rust replacement for 150. Works for me, now I won't feel bad when I spray bomb it black and beat it up worse!
https://uploads.tapatalk-cdn.com/20180211/a27e8f002d491b9e1e87c635e4f8920e.jpg
My fatty clamps came in, still waiting on my handlebars.
https://uploads.tapatalk-cdn.com/20180211/9d35d39eb404ded53df1309c3b6bee33.jpg
The Handlebars are going to be my reference. Because of the height of the front setup I'm using regular motorcycle bars (I may end up cutting them down a hair if they feel too wide). Everything else will be fabbed so I can adjust it all to work well with the handlebars (footpeg position, seat height, ect). Once the bars get in I can start hacking the subframe.

Sent from my SM-G900V using Tapatalk

plevib

02-11-2018, 12:04 AM

OK! Fine.

I got impatient.

And turns out I'm gonna have to modify the seat pan to make it drop down more. I think I'm gonna use the gap between the tank and the seat for a quick release hook as this fender will be mounted on a hinge (motorcycle kicker swings back into fender)https://uploads.tapatalk-cdn.com/20180211/bc78c384e13d48c2b605e4639ad2b658.jpghttps://uploads.tapatalk-cdn.com/20180211/acccf8038f540b7b5f6b14a314cf225d.jpghttps://uploads.tapatalk-cdn.com/20180211/77129e478bd8b5a2e55d213d90284b6d.jpg

Sent from my SM-G900V using Tapatalk

oldskool83

02-11-2018, 12:39 PM

Run a newer yz tank or a ttr250 tank. You don't need metal bashing up yourknees. It's 2018 not 1983. Tanks are cheap then you could run yfz fenders.

plevib

02-11-2018, 01:09 PM

Run a newer yz tank or a ttr250 tank. You don't need metal bashing up yourknees. It's 2018 not 1983. Tanks are cheap then you could run yfz fenders.I'll take a hard pass on the yfz fenders. Ugly as sin! You do realize you're on a board about machines that they quit making in the 80's right? Haha...

I agree that plastic tanks are less maintenance, but beating up your knees? And I've put freaking dents in my 500x tank and never even noticed any pain in my knees.....

But I already bought a replacement and I'm very happy with it. Plus I can paint black to match my other mad max xt550

Sent from my SM-G900V using Tapatalk

plevib

02-14-2018, 07:29 PM

Oh man now I'm getting excited! Looking freaking sweet! I found a seat height I like. It's about 34 inches so it'll be like a hi flite which is perfect cuz I'm about 6'4". Now it's time to fire up the buzz box!https://uploads.tapatalk-cdn.com/20180214/b5c61185796d6ebf9dd0989be576caf9.jpghttps://uploads.tapatalk-cdn.com/20180214/838c9cc9432e879c4e973617b239452d.jpghttps://uploads.tapatalk-cdn.com/20180214/a7683802f28b16110171c3275634e4fd.jpghttps://uploads.tapatalk-cdn.com/20180214/b9905126a44bf6fe042ac0264f829043.jpghttps://uploads.tapatalk-cdn.com/20180214/fd959c7cd3cd0ea1d8e0c7d412dfb641.jpghttps://uploads.tapatalk-cdn.com/20180214/cd83b9f57b01c67f962501541fa946a2.jpghttps://uploads.tapatalk-cdn.com/20180214/f5e2ef69dfd977b97c749e8ad93f9e50.jpg

Sent from my SM-G900V using Tapatalk

big specht

02-14-2018, 07:57 PM

Damn is that tranny geared that high to need that big of a sprocket with those tires? Anyways it's looking good

plevib

02-15-2018, 07:55 PM

Damn is that tranny geared that high to need that big of a sprocket with those tires? Anyways it's looking goodHaha was wondering when someone would notice that. No actually I'm gonna pull that sprocket off. I can't remember what the tooth count on it but I found a 17t for the front to make it reasonable to raise the chain. I was originally concerned with it riding on the chain slider but after look at some other modern bikes I guess they just do that. So I'm going back to close to stock

Sent from my SM-G900V using Tapatalk

plevib

02-18-2018, 03:46 PM

Decided it would be easier to build a new sub frame rather than modify the old. https://uploads.tapatalk-cdn.com/20180218/5a17f7ccce0c6129c91c85af8a8e61f6.jpghttps://uploads.tapatalk-cdn.com/20180218/17fa139759338a0e15a9fa7132f358bd.jpghttps://uploads.tapatalk-cdn.com/20180218/c75fef36e9fa48afd0d4090cb0a64844.jpg

https://uploads.tapatalk-cdn.com/20180218/8db54813ce8c296ae088e01de0a3c579.jpg

plevib

02-18-2018, 07:39 PM

Maybe everyone's eyes have glossed over for this build but I'm freaking excited! Sub frame is pretty much done just have to gusset everything and reinforce the shock mount! https://uploads.tapatalk-cdn.com/20180218/865e04adc0bc86cba9738ca14cce4874.jpghttps://uploads.tapatalk-cdn.com/20180218/eda5a13ca303a48118fee8dfad07293e.jpghttps://uploads.tapatalk-cdn.com/20180218/1e8e89aa0623c3be6f85b58681206487.jpg
Gonna use these to hold the front down. Having it come up on a jump doesn't sound fun....https://uploads.tapatalk-cdn.com/20180218/a5fa1acd9e40739a0553109b7ed47d36.jpg

fabiodriven

02-18-2018, 08:43 PM

I'm watching now! I haven't been following from the beginning but I'm going to start reading from the first post next chance I get. It looks great!

big specht

02-19-2018, 09:21 AM

You could make it lock down like the old leager cr conversion kits did with the rear bushings from most Honda atc I will try to get a pic of that set up

Footy

02-19-2018, 11:18 AM

We are watching. I am blown away by your fab skills. When you started this thread I had my doubts. Now that I have seen your skills I am not only confident in this build but maybe even a little jealous. Can't wait to see it complete.

fabiodriven

02-20-2018, 01:26 AM

Run a newer yz tank or a ttr250 tank. You don't need metal bashing up yourknees. It's 2018 not 1983. Tanks are cheap then you could run yfz fenders.

Go build your own bike Oldstool!

fabiodriven

02-20-2018, 01:28 AM

Plevib I gotta say, this is a fantastic build! I read it from the beginning and wow! I'm impressed! Now I can see why you're wondering why more people aren't commenting. Great build dude!

plevib

02-20-2018, 10:10 PM

Thanks for the support guys. Most people look at me like I'm crazy when I tell them about this project haha... anyway, the upper shock mount is done, just have to finish a few welds once I disassemble. And like I said, I will be gussetting everythinghttps://uploads.tapatalk-cdn.com/20180221/576c9f54907e8f7da5f5e81eec09b226.jpghttps://uploads.tapatalk-cdn.com/20180221/b6f4d6c65a0a29bb87e49f66d734601f.jpghttps://uploads.tapatalk-cdn.com/20180221/0ebc123012b8c9343764bab4e0086911.jpg

Sent from my SM-G900V using Tapatalk

Footy

02-21-2018, 08:00 AM

plevib

02-21-2018, 08:45 AM

I am sure that you have already thought about this and it is on your list to do later. Dual sport bikes from that era all had the foot pegs mounted on rubber to reduce vibrations. Also the pegs were tiny at that time. What are your plans to improve the foot peg set up?Actually this model didn't! Surprisingly. But I'm cutting them off and sticking with the yfz theme and making a mount for some stock yfz foot pegs

Sent from my SM-G900V using Tapatalk

plevib

02-23-2018, 08:49 PM

May not seem like much but I was really scratching my head about how to make the front seat mount! I also mounted a xt600 head pipe. 2mm larger than stock, longer design and much better collector. I was originally planning on a stock trx450r muffler, but it would interfere with my hinged seat. I found a supertrapp in good shape that'll fit much better. https://uploads.tapatalk-cdn.com/20180224/8e41cb7930856badd350ab1fdb10f873.jpghttps://uploads.tapatalk-cdn.com/20180224/0eb07162c4a7b5f7f9678cdbbc35d4d6.jpghttps://uploads.tapatalk-cdn.com/20180224/a3847787471a70d0992b69875287d558.jpghttps://uploads.tapatalk-cdn.com/20180224/63f34c0164be54622c6d38d7ae4949d2.jpghttps://uploads.tapatalk-cdn.com/20180224/08d144f40be8dc48bebc43a6bc48fe9a.jpg

Sent from my SM-G900V using Tapatalk

plevib

02-23-2018, 10:27 PM

Oooo footpegshttps://uploads.tapatalk-cdn.com/20180224/42baa74210ead84d195f712f781f97d4.jpghttps://uploads.tapatalk-cdn.com/20180224/76ef018a3d29dc8fb0e258203dd93010.jpghttps://uploads.tapatalk-cdn.com/20180224/3d270aba6970962ca9557da60fe543c3.jpghttps://uploads.tapatalk-cdn.com/20180224/822b329fe416f92637e04106c86866a5.jpg

Sent from my SM-G900V using Tapatalk

Footy

02-24-2018, 07:49 AM

Awesome work. I like your foot peg setup.

big specht

02-25-2018, 10:57 AM

250636250637
This is what I was talking about for a seat latch

plevib

03-04-2018, 02:11 PM

250636250637
This is what I was talking about for a seat latchOh gotcha. Well that does look nice. I already have my latches and a good plan so I'm gonna stick with this plan but I'm definitely remembering that for the next one!

Sent from my SM-G900V using Tapatalk

plevib

03-04-2018, 02:15 PM

Rear brakes are done! Very very pleased with how simple and stock it looks! And got my carb and filter figured out (I know the filter is dirty haha, I'll clean it later). I realized I had an extra 34mm mikuni and filter from my 500x. I already have jets from 80 to 500 for mikuni and I know this setup works well on xt550's. So I decided to ditch the dual carb setup https://uploads.tapatalk-cdn.com/20180304/e932f22ef59b4f0175d9f0e027f2d1af.jpghttps://uploads.tapatalk-cdn.com/20180304/50b5243d5a45be6fad5be9a83b59c183.jpghttps://uploads.tapatalk-cdn.com/20180304/8bb1116dd29d6cd5529fc5fa1f1b0e0f.jpghttps://uploads.tapatalk-cdn.com/20180304/520d565642bbf302ee1a2daaeb6aee1b.jpghttps://uploads.tapatalk-cdn.com/20180304/9b8b07640a4b105842e4d2cd57cdb02e.jpg

Sent from my SM-G900V using Tapatalk

fabiodriven

03-04-2018, 03:08 PM

Loving this build, it looks great! I'm not the expert, it may be fine, but if you have tuning problems the first thing I would suspect would be the tube from the mouth of the carburetor to the air filter. It would probably stand to benefit from a bigger intake tract or some sort of "dead air" space like what an airbox would provide. Again, it might run fine as is and I realize an airbox isn't really much of an option, but if it didn't run right that's the first area I'd suspect.

plevib

03-04-2018, 03:49 PM

You know actually a custom air box isn't totally out of the question. I'll have to mull that over some because I would also like the water protection..... thanks for the idea! Maybe after I get it running and test it some I will build an air box

Sent from my SM-G900V using Tapatalk

plevib

03-04-2018, 05:17 PM

Exhaust is done. It took a lot of messing around to make it work but I'm good with how it turned out. There's a handful of other fab things to do left (front brakes, skid plate, headlights, chain slider) but all of the hard stuff is done! Really starting to look like a trike! https://uploads.tapatalk-cdn.com/20180304/5d619299d9fb0469b10cb5f25e732b0e.jpghttps://uploads.tapatalk-cdn.com/20180304/f1ce585fa62499d5932eadcab58f6d45.jpghttps://uploads.tapatalk-cdn.com/20180304/e43195a985287ca33d0fcec3a43b6ff3.jpghttps://uploads.tapatalk-cdn.com/20180304/aad4385adf0ab62cab353173e2376f34.jpghttps://uploads.tapatalk-cdn.com/20180304/dc1196574ac90f14a6de2563dfb41ef9.jpghttps://uploads.tapatalk-cdn.com/20180304/0b0954d920808777bc911183ced4658c.jpg

Sent from my SM-G900V using Tapatalk

ironchop

03-04-2018, 05:54 PM

Very interesting build

Sent from my Z958 using Tapatalk

plevib

03-07-2018, 12:01 AM

After a lot of trying to figure out how the heck I was gonna make a grab bar that didn't interfere with the hinged seat I had an idea haha. Not ideal, but very very easy and it'll work just finehttps://uploads.tapatalk-cdn.com/20180307/af0f58f7bf70787d6a6f4edd766660da.jpg

I also ordered some 10mm washers to space the sprocket in a bit to line the chain up better. They are 4mm thick and I'm hoping to shave down the adjuster to make room for 8mm. I will have to countersink the sprocket to make it clear.
Slowly but surely.https://uploads.tapatalk-cdn.com/20180307/73ff5ec4056880b2c9a48f64df523b82.jpghttps://uploads.tapatalk-cdn.com/20180307/ca6838bebd3c39ac25e04b77384ddd22.jpg

plevib

03-08-2018, 12:22 AM

Soooo... ah..... this is not notably pretty..... I think it'll work for now, but I might have to try to make this piece out of a chunk of aluminum or maybe I'll totally scrap this front hub assembly and try a 200x hub. Idk yet. For now I'm gonna leave it so I can finish more pressing things on this build (who uses the front brake anyways! Haha........) but know that I'm not happy with how this turned out, and will likely change it, so don't judge too hard hahahttps://uploads.tapatalk-cdn.com/20180308/645b62d1fa93b8a014aa913c2cd14ca8.jpg
Don't worry I'll cut these bolts down and remove some spacers, just a proof of concept
https://uploads.tapatalk-cdn.com/20180308/faa63d62e6cd0e85aced0006370ca544.jpghttps://uploads.tapatalk-cdn.com/20180308/f1483dba98211555774e55d55ba73469.jpg

Sent from my SM-G900V using Tapatalk

plevib

03-08-2018, 12:44 AM

So this unexpected! The pads on the rear caliper (2004 yfz450) I got are shot, so I was about to buy som. I looked a little closer at them and thought, wow, those look just like old Honda pads (200x, 2nd Gen 250r). I have some spares around and sure enough! Exactly the same! Never would have guessedhttps://uploads.tapatalk-cdn.com/20180308/2cc1afc1dbdb9ea23a30db8a605f5865.jpg

Sent from my SM-G900V using Tapatalk

plevib

03-11-2018, 03:53 PM

Call me a redneck but I'm digging the strap, gives it a rally car feel haha. Got the chain lined up very nicely. I'm confident I won't have any issues with it falling off. Now I'll get the slider attachedhttps://uploads.tapatalk-cdn.com/20180311/f81788166572bf92399631fc8c251157.jpghttps://uploads.tapatalk-cdn.com/20180311/b6fb56335a93105f83c0ccb975fe1fc1.jpghttps://uploads.tapatalk-cdn.com/20180311/343d8ceaf01d23b99b77a05b74529b15.jpghttps://uploads.tapatalk-cdn.com/20180311/61aa87f1effecc251f9613ef72ffb304.jpg

Sent from my SM-G900V using Tapatalk

plevib

03-11-2018, 05:14 PM

Moving right along. Again, it seems weird to have the chain actually putting pressure on the slider, but that's how most bikes do it nowadays so I'll go with ithttps://uploads.tapatalk-cdn.com/20180311/34d101d3d7fd03af3cd7a277361df8d7.jpghttps://uploads.tapatalk-cdn.com/20180311/9d6ca24cadbb0846878e380953bb1cbf.jpg

Sent from my SM-G900V using Tapatalk

plevib

03-13-2018, 08:49 PM

Added a roller. Looks like most modern bikes so I'm happy. https://uploads.tapatalk-cdn.com/20180314/7cc3b0539d2ee45ad54ce509fd35a5cf.jpg

Sent from my SM-G900V using Tapatalk

plevib

03-13-2018, 11:57 PM

Seat pan and latches are done. Skid plate, steering stop, and gussets are the only fab work left!https://uploads.tapatalk-cdn.com/20180314/0fc4b12763dca78de66ac0a0e5c1db45.jpghttps://uploads.tapatalk-cdn.com/20180314/2f0d6d89e5a43e66be51711b7da125ba.jpg

Sent from my SM-G900V using Tapatalk

Rob Canadian

03-14-2018, 06:37 PM

It is coming along very well!! Nice job

What gearing did you go with? I see you got rid of the SAW blade. LOL

plevib

03-14-2018, 08:42 PM

It is coming along very well!! Nice job

What gearing did you go with? I see you got rid of the SAW blade. LOLI can't remember like a 42 or something. It's just one I had. Something like this you just have to ride before you know haha....

I found a treat on fleabay!

https://uploads.tapatalk-cdn.com/20180315/75561fc3cb794552a08b3babbca84cc4.jpg

I'm stoked that I found this for pretty cheap! I'll do leds in it but this will help establish it as a yamaha (to offset the seat and fenders haha...)

plevib

03-18-2018, 02:22 PM

Let's see how many more colors I can get on this thing hahahttps://uploads.tapatalk-cdn.com/20180318/20e44382045974c7bd75c4dbcd0e79bd.jpghttps://uploads.tapatalk-cdn.com/20180318/b7698025306dd964fec6f5ee0f939dd2.jpghttps://uploads.tapatalk-cdn.com/20180318/b1b8c8a2aef10eb050944c818b2d5636.jpg

Sent from my SM-G900V using Tapatalk

plevib

03-18-2018, 02:54 PM

Electronics mountedhttps://uploads.tapatalk-cdn.com/20180318/29a3bbb42b0faa65e24d4ad6628a105b.jpg

Sent from my SM-G900V using Tapatalk

plevib

03-24-2018, 12:12 PM

Got some more stuff in today. For now I got the seat recovered
https://uploads.tapatalk-cdn.com/20180324/0760cbd7ef54704fe2bba717b809caef.jpg

Sent from my SM-G900V using Tapatalk

plevib

03-24-2018, 05:38 PM

I've never used plastidip on anything before but I know paint would crack on these fenders with how hard I'm gonna lean on them.... so I'm trying it out. We'll see how it lookshttps://uploads.tapatalk-cdn.com/20180324/6ec944161bbac90d55433b9ebf000ba4.jpghttps://uploads.tapatalk-cdn.com/20180324/8c7854701a2ed8d3a810c084ff57b6ce.jpghttps://uploads.tapatalk-cdn.com/20180324/359278d5970576603f466cadb1ff97c0.jpg

Sent from my SM-G900V using Tapatalk

HondaRidr

03-25-2018, 10:02 AM

I'm excited to see this coming together. It's one of the more unique builds on here

Sent from my SM-G930T using Tapatalk

plevib

03-25-2018, 11:16 AM

I'm excited to see this coming together. It's one of the more unique builds on here

Sent from my SM-G930T using TapatalkThanks man, me too! Getting to the final stretch.

I should be like tearing the bike down and finishing welds but I couldn't resist a teaser of the final product haha. After this picture I took the tank back off and went flat black. (Should have went with my gut in the first place haha) The semi was way too glossy. Looked weird against the plastic. https://uploads.tapatalk-cdn.com/20180325/dba5931d9d0a6dcad3c5b7892b83c3c2.jpghttps://uploads.tapatalk-cdn.com/20180325/44ba01d94ea2f95986f2c11adcd35705.jpghttps://uploads.tapatalk-cdn.com/20180325/a14c82ce928963be7f49aed1d8c8b0b5.jpg

Sent from my SM-G900V using Tapatalk

big specht

03-25-2018, 11:30 AM

You could paint it flat black with gloss sides like where the decals would go that would give it a different look

plevib

03-25-2018, 11:37 AM

You could paint it flat black with gloss sides like where the decals would go that would give it a different lookMeh... too much work hahaha. It'll be covered in mud 10 minutes after I get it running anyways haha. I don't believe in trailer Queens! ;)

Sent from my SM-G900V using Tapatalk

sledcrazyinCT

03-25-2018, 12:20 PM

https://uploads.tapatalk-cdn.com/20180318/20e44382045974c7bd75c4dbcd0e79bd.jpghttps://uploads.tapatalk-cdn.com/20180318/b7698025306dd964fec6f5ee0f939dd2.jpg

Looks like the exact LED lights we are going to use in my Tri-Z! We bought 8 lights for a crawler loader and when they came they slipped inside the headlight shell. Thanks for the pic on how you mounted them!

Really nice build! Your getting to all the details to make this perfect!

plevib

03-30-2018, 12:52 AM

Looks much less impressive now.... haha.... had a couple hours tonight. Got the top end apart, looking good so far. The cam chain tensioner is stripped. I ordered a replacement and a new chain. Bore looks so so but I think I'm gonna leave it alone. Cam is in very very nice shape, valves look fine. Lots of carbon, looks like this thing has been running rich which is always better than the alternative haha... https://uploads.tapatalk-cdn.com/20180330/8e84a5ab2782b5a77eabd765eed99d38.jpghttps://uploads.tapatalk-cdn.com/20180330/c8d9a6037afea9cd15344b9ee620324a.jpg

Sent from my SM-G900V using Tapatalk

Red Rider

03-30-2018, 03:57 AM

Impressive fab skills and work so far plevib! Keep at it.

plevib

04-07-2018, 01:34 PM

Well... that sucks. I got the engine tore down, cleaned all the big components (I ordered a ultra sonic cleaner for the smaller parts cuz they suck to clean). I found that the counter balancer keyway was wallowed out. I figured I could grind it larger and fit a bigger key in it. So I moved on. well I was checking the bearings to make sure I didn't get any sand in them and.... found a bad one. Looked closer and it was caused by a crack in the case. So both of the cases on this engine are trash and I only bought a left side replacement. But on the bright side I found a set of cases with a damaged left side AND a counterbalancer for 70 bucks! Couldn't be more perfect or cheaper for my situation. So I unfortunately won't get the engine built this weekend like I was hoping.

So the replacement cases are on order and since this sets me back anyways I ordered a set of rings too. I found oem for 40 bucks so I figured "while I'm in there" applies here haha.

So I'm switching gears to the frame this weekend. My goal is to finish welding, paint, and hopefully have a roller at the end of the weekendhttps://uploads.tapatalk-cdn.com/20180407/954b744d799ebd68ed17cf370d60a7eb.jpghttps://uploads.tapatalk-cdn.com/20180407/b70638512daab5fb69008e43fc784524.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-07-2018, 07:58 PM

Gussets are done! As is the steering stop. Looks almost identical to my 84r turning radius. All the frame welds are done. Supper break and make sure there's nothing I'm forgetting then off to paint! So freaking excited!https://uploads.tapatalk-cdn.com/20180407/c9b1cf2ca0fbb87abe89f408cab578e0.jpghttps://uploads.tapatalk-cdn.com/20180407/0034d4436c1ceb535eca3db347fecaec.jpghttps://uploads.tapatalk-cdn.com/20180407/fe21e1d0d4f88ce5c1d0fc0faa26c72f.jpghttps://uploads.tapatalk-cdn.com/20180407/1b9e0841d9a351ecc149e2a662287360.jpghttps://uploads.tapatalk-cdn.com/20180407/a8e283095778ca403ddcceaf403c5b9e.jpghttps://uploads.tapatalk-cdn.com/20180407/636a7ee78f9981ed04300c12b9b9ecd2.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-07-2018, 11:35 PM

A grinder and paint. ......

Well, you know the resthttps://uploads.tapatalk-cdn.com/20180408/1e606a46eb2950eb617a7755d3f42bf9.jpghttps://uploads.tapatalk-cdn.com/20180408/3a99ce7d357ba064790b0fd0008b7800.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-08-2018, 12:26 AM

I decided I could see the linkage possibly causing my bracket to flex or bend so I added a couple more bolts.

That's the difference between an engineer and a fabricator. An engineer says "how can I make this cost efficient and light and still accomplish the task?" A fabricator says "meh, I'll just add some more metal there to stiffen that up...." hahahttps://uploads.tapatalk-cdn.com/20180408/0076262bcc9caccf2802bafec83738d4.jpghttps://uploads.tapatalk-cdn.com/20180408/1764970b978d41ea23a6d621db5a1c48.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-08-2018, 01:17 AM

Back in blackhttps://uploads.tapatalk-cdn.com/20180408/df1b397bfdd2dd294ad9cd5f3f414eb9.jpghttps://uploads.tapatalk-cdn.com/20180408/b4673935edc1b9883b942b1f5d275b4d.jpghttps://uploads.tapatalk-cdn.com/20180408/2580c720cc1760e073559e5e1e766382.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-08-2018, 04:30 PM

Got a roller. Hopefully all my motor parts come in this weekendhttps://uploads.tapatalk-cdn.com/20180408/5a98856782f56cacceff1d0f5313d8e2.jpghttps://uploads.tapatalk-cdn.com/20180408/1aa10d0cd651d6546cd295a88a721c21.jpghttps://uploads.tapatalk-cdn.com/20180408/65414584127708e25b74f9a56d776386.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-18-2018, 01:57 AM

Burned some midnight oil and got the bottom end back together with the replacement parts. Still waiting on my rings to come in..... if they don't come in by the weekend I may get impatient and put it together without them.https://uploads.tapatalk-cdn.com/20180418/c3fe9dc43e0406d29e882f8c84fc97fa.jpghttps://uploads.tapatalk-cdn.com/20180418/d64e13910499189493d553f75f634c3d.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-20-2018, 12:01 AM

Hoo-rah!

RIP gunny

Dropping it in tomorrowhttps://uploads.tapatalk-cdn.com/20180420/c4bffec75caa7d35ea0e70e306a2b1f9.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-20-2018, 08:36 PM

Can't get over how sexy this thing ishttps://uploads.tapatalk-cdn.com/20180421/390af621f844ad0d09009d21a8cb607a.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-21-2018, 02:10 AM

https://youtu.be/O08xB8GMBbY

She lives! But I forgot to get a petcock so.... I may do a test run tomorrow with a lucas oil fuel tank haha.

Sent from my SM-G900V using Tapatalk

plevib

04-22-2018, 04:40 AM

Got her all together! Took her for a spin and boy, holy torque batman! Feels really comfortable for me, which is something I don't usually say for my trikes (6'4") haha. Unfortunately the steering is pretty heavy. I'm gonna crank up the rear spring and slide the forks up in the triples to try to lighten it up some. But it's 4 in the morning so I'm calling it haha

]https://uploads.tapatalk-cdn.com/20180422/607e60ffbe207584c20814dcd933fe7a.jpghttps://uploads.tapatalk-cdn.com/20180422/e16890fdd03cc84a0d100928a1698abe.jpghttps://uploads.tapatalk-cdn.com/20180422/8adf6285897ceb00afc80c9904e6bcf5.jpghttps://uploads.tapatalk-cdn.com/20180422/e74734149b477e32b05c47fc067bc813.jpghttps://uploads.tapatalk-cdn.com/20180422/e5dea2c9a148e23ad45de3c10154aa0f.jpg

Sent from my SM-G900V using Tapatalk

plevib

04-22-2018, 01:50 PM

Here's a better walk around video. One mean machine!

https://youtu.be/6aiy84ABlqY

Sent from my SM-G900V using Tapatalk

fabiodriven

04-22-2018, 01:53 PM

Looks great dude!

plevib

04-22-2018, 01:58 PM

Woohoo!

https://youtu.be/FmnDNPuBYwg

Sent from my SM-G900V using Tapatalk

plevib

04-22-2018, 09:15 PM

Here's how it compares with my 84r. The rake is very close so the heavy steering must have to do with the head tube angle. Oh well. By the end of the summer I'll have a grin on my face and buff arms haha...

On a related note I found a very very nice head for the 500x so that one is going back together this week. Hoping to get them both done and take them to the farm this weekend, but I'll at least get the 550 done for sure.

Couple odds and ends left, then I can go for a real ride on it!

https://uploads.tapatalk-cdn.com/20180423/b52a52f472272811e01473e812c2781c.jpghttps://uploads.tapatalk-cdn.com/20180423/f80952b2d64f2cc734c0a183b14f4ffb.jpghttps://uploads.tapatalk-cdn.com/20180423/99df45a839f9d0101a5ec2f3238676ac.jpg

Sent from my SM-G900V using Tapatalk
https://uploads.tapatalk-cdn.com/20180423/903b305d7f32c9f6d6ae63e1f5cd7aa5.jpg

Red Rider

04-22-2018, 10:03 PM

The rake is very close so the heavy steering must have to do with the head tube angle.Correct me if wrong, but your VTX tripleclamps have zero rake built into them, and your 250R tripleclamps do. The 250R tripleclamps were designed for a trailing axle setup. I would try what you suggested in an earlier post (changing the rear-end ride height), but also spin your forklegs around to leading axle, then adjust from there.

plevib

04-23-2018, 07:49 AM

Correct me if wrong, but your VTX tripleclamps have zero rake built into them, and your 250R tripleclamps do. The 250R tripleclamps were designed for a trailing axle setup. I would try what you suggested in an earlier post (changing the rear-end ride height), but also spin your forklegs around to leading axle, then adjust from there.Yeah they don't have any rake built in, but wouldn't a leading Axle expound the problem? I'm no expert but my understanding is that a leading axle is more stable, but less responsive and a trailing axle is lighter and less stable. Maybe I'm wrong but that's why I went with trailing. Also all atc's I've seen are trailing

Sent from my SM-G900V using Tapatalk

BOB MARLIN

04-23-2018, 08:56 AM

plevib

04-23-2018, 12:58 PM

There is more to steering geometry than rake. The "trail" part of the geometry I believe has a bigger effect. If you change your forks around to a leading axle it will decrease the trail, making the steering less heavy.You know after doing some more research I've found that my understanding of trailing vs. Leading may be backwards! I'll try flipping it and see if that helps. Thanks for making me rethink that haha

Sent from my SM-G900V using Tapatalk

fabiodriven

04-23-2018, 01:20 PM

Red Rider

04-23-2018, 02:21 PM

With your combination of zero rake tripleclamps, trailing axle fork setup, and similar rake to your 250R, I'm betting you have way too much trail. Flipping your forks around to a leading axle configuration, with that same head tube angle, may result in too little trail, so you'll probably have to adjust the rear-end ride height, and possibly the front as well, to get the head tube angle where it needs to be, but you'll be happy with the effort when you get it right. Also, all Tecates & 350X's were leading axle.

BOB MARLIN

04-23-2018, 05:50 PM

fabiodriven

04-23-2018, 07:11 PM

Trail is leverage. More trail means more leverage the ground has against the handle bars as it is trying to keep the front wheel strait, giving it a heavy feel. Less trail moves that leverage back to the handle bars. Too little trail will make the bike /Trike unstable at higher speeds and feel "twitchy" because the ground is no longer helping to keep the wheel strait. You need to find the sweet spot.
In your setup, it looks easy to try the axle flip first, since it appears you all ready have a pretty steep angle to your swing arm.

You've got it completely backwards Bob.

Axle leading or axle trailing is irrelevant. Whether the rake is built into the steering neck, the triples, or the position of the entire frame itself, the rake is the upright line which the front forks follow as they sweep left and right. The difference between leading axle and trailing axle is built into the rake in order to accommodate the decision to make the axle either leading or trailing, not the other way around. If you're using your axle position to alter your rake, you're doing something wrong. Decide which axle position you'd like and then rake it accordingly.

fabiodriven

04-23-2018, 07:20 PM

My XR650L conversion still has the bike rake, which is too much rake and not enough trail, and it handles like it has too much rake. I've known it for years and I know very well what too much rake looks and feels like. Go ahead and swap the axle around if you want to, but it's going to make the steering even more heavy.

plevib

04-23-2018, 09:20 PM

OK well the results are in and Bob and red rider are right! Leading axle and the steering is nice and light! I haven't ridden it more than up and down my alley so I can't say how it is at high speed, but it's definitely more comfortable now. I don't really firmly grasp why it made it lighter, but it did and I'm stoked!

Thanks for the help guys!

Gonna button up a couple odds and ends. This weekend she gets a real life test. Can't wait!!!

Sent from my SM-G900V using Tapatalk

fabiodriven

04-23-2018, 10:45 PM

Seems crazy to me but I'm glad it's better!

BOB MARLIN

04-24-2018, 09:11 AM

wonderboy

04-24-2018, 11:12 AM

Trail is leverage. More trail means more leverage the ground has against the handle bars as it is trying to keep the front wheel strait, giving it a heavy feel. Less trail moves that leverage back to the handle bars. Too little trail will make the bike /Trike unstable at higher speeds and feel "twitchy" because the ground is no longer helping to keep the wheel strait. You need to find the sweet spot.
In your setup, it looks easy to try the axle flip first, since it appears you all ready have a pretty steep angle to your swing arm.

I think what Bob is saying here is correct. I've been reading on this a bit, and although still new to me, this explanation of trail is consistent with the RaceTech suspension book.

Trail is the distance between the contact patch of the tire and the location where the steering axis intersects the ground. So as far as forces being generated on the steering system, it really is just the contact patch acting through the lever arm (the trail distance) to the steering axis. So longer trail would require you to overcome a larger force than shorter trail.

All the other geometry aspects (rake, offset, leading axle, etc) simply determine what the final trail distance will be.

ironchop

04-24-2018, 12:31 PM

Rake is a funny thing. Even the "rake" that's built into a 250r's triples isn't really rake. Rake is in the neck of the frame, not the forks. The so called "Rake" in the 250r triples I believe is there to lessen the trail. The axle leading or trailing has an effect on steering also, but I haven't really studied that as much, but It does move the axle position quite a bit as it relates to trail.This^^^^

Your frame neck is what is swiveling when you turn your handlebars and you measure directly thru the frame neck center to the ground at that angle to get your rake position, then you measure where center of your axle is perpendicular to the ground. You measure between those two points to get your trail figure.

Incorrect trail gives you steering issues

Raked trees only correct the trail so that they can put axles in more convenient locations relative to the forks and their design.

http://ridermagazine.com/2009/06/30/understanding-motorcycle-rake-and-trail/
Sent from my Z958 using Tapatalk