View Full Version : 2012 Raptor 125 built into a 96CC 2-stroke
oscarmayer
12-17-2014, 05:31 PM
my son has moved up in classes and so got a very nice rapy 125 for a steal. I am going to pull the motor and drop in a YZ85 with BB kit and run that for the class. I'll post photos of the progress.
First order up is stripping the down to the frame for engine removal, gusseting and such. from there will be the new engine mounting designs and radiator mounting and finally swingarm re-enforcements and such.
as i progress, i'll post remarks, photos and info on what I am doing and why.
hope ya'll like my build.
oldskool83
12-18-2014, 09:08 AM
when he's ready for a 125 2 stroke let me know, I got a nice RM package I'd like to sell for a good price.
oscarmayer
12-18-2014, 05:35 PM
you got it sir!
oscarmayer
12-29-2014, 11:58 PM
well here's where we are at.
ATV was torn complete down tot he frame. sold motor and all electrical and exhaust.
I wondered why when we adjusted the suspension it never quite worked how we wanted it. Well we found out why. the previous owner had a bad accident and tweaked the front end of the frame some. $200 later it will be straightened. So I ordered a new gusset kit. I do all my own work, so I'll be welding in the new kit and then having the Frame powder coated Kawi green. (my son likes green so quad colors are green and white.) I'm also going to get the a-arms coated. thank god I took them apart, bearings were failing and both lower ball joints were shot to piss. We just got sponsored by LSR racing. Yes Lone Star Racing. So I am probably going to get him a +2 chromoly swinger and will also get him a new Fox rear shock. The front shocks are custom valve and sprung YFZ450R shocks and work perfectly (Very heavy duty compared to others) but they will need a refresh for this season, so I will have a place do them near me. Cost is $210 for both fronts so very good deal! For an extra $50 they will help set the sag and other settings for my son's riding to center so we have a good middle starting to adjust from.
Motor was shipped off to Lukesracing.com (Awesome 2-stroke shop) to get new HotRod crank, and 96cc BB setup installed.
oscarmayer
12-31-2014, 09:21 PM
well stuff is coming in. got the stainless braided rear line for the extended swinger I ordered from LSR. got the gaskets and seals as well.
should have frame back Monday and should have gusset kit either by this weekend or early next week so I can get started on gusseting it.
briano
01-01-2015, 11:35 AM
Sounds like a cool project for sure. I'll be peeking in to check on progress.
oscarmayer
01-05-2015, 03:15 PM
well lots of stuff being done.
I will pick up straightened frame this evening, i already ordered +2 LSR swinger w/bearing carrier (already got their axle), I will be ordering the fox racing shox as well. main motor was sent off to sponsor's shop for rebuild (Lukesracing.com). He is also going to do a 2nd top end for a "spare" motor I am doing up myself. (Instead of them building it, I will be building it the same way but I will do the labor on the bottom end). hotrod cranks were ordered and should be here this week. one for the sapre and one gets sent to luke's racing.
I still need to look at a clutch setup. for now I will run the stock basket, but I will look at getting a billet wiseco setup in the next 3 months. 1 setup should be fine for the main motor and the spare can stay stocker with new discs, plates and springs. If needed I can awlays swap the billet stuff into the spare later.
I ordered 2 new 28mm carbs from yami. in the box new for an awesome deal! i will polish them out so there are no rough spots and flow is smooth. I Also have a jet kit i will use I am going to start with jets being x2 sizes bigger than stock to start and go from there. that is for both pilot and main jet sets.
I expect the dusset kit to come in this week. Once frame is gussetted, I will take frame, and a-arms over to get blasted and powder coated kawi green. (my son wants it that color)
I will also be ordering green stuff as much as possible and having any parts I decide to be either green or black. our colors are Green and White, but a littler black here or there is ok too.
i will post photos once i egt the frame gussetted and ready for the coater.
This is going to be pretty cool. How did your son do on the kx based quad last year?
jakep53
01-06-2015, 04:21 AM
wow this sounds awesome! very lucky kid!
oscarmayer
01-06-2015, 11:03 AM
Thanks for asking. He took 6th over all in his class out of 16 riders, so not too bad. The other ATV I sold. It was just too narrow and short. With the kx65 being built and out maxed and it was just way to powerfull for that frame, the guy that baught it is going to have his son do CX racing with it. I kow it will work beautifully for that hands down (I spect his kid to have some wins as he grows in skill). It just doesn't like the mx track when being pushed hard. Trying to corner at high speeds it skipps across the track and causes my son to slow down too much. The old frame was a modified typhoon xtreme.
We ran some practice session with the raptor using the stock 125 and the suspension was night and day difference for him. He is already trying to see how far he can jump it and the limit is the motor. It just can't give him the grunt he needs to clear tables and doubles. The new YZ85-BB to 96cc 2-stroke will do wonders for him. Along with the +2 swinger and fox rear shock(current rear is stock no rebound). I think this year he has a good chance to make it to the podium more often.
oscarmayer
01-06-2015, 05:37 PM
frame man called and sais frame is done!
post man emailed sayign i had several packages delivered!! (mmuuwwaahaaaa!!! chrismas #2!!!!)
oscarmayer
01-09-2015, 09:57 AM
I Completed the gusset kit install last night and started building new motor mounts. got the rear done (except for the spacers i need to make once I decide side movement). I believe I have a good idea for the front mounts now too. The next thing is I will have to modify an existing pipe to fit with the radiator where it needs to be mounted. I have some photos on my phone and will try to figure out how to upload them later, The pipe is gonna be a booger....
oscarmayer
01-11-2015, 10:16 PM
Gere are some photos of the progress.
gusset kit welded on. rear engine mount made and bolted on, photo does not show, but i am working on 3 different designs for front engine mounts trying to decide best before i send frame off to get coated.
The final photo is the first time he rode the raptor he took it jumping. So you can see it needed the gusset kit especially with a much faster engine that is going into it.
oscarmayer
01-14-2015, 10:57 PM
I did some more work. Mounted the radiator and test fit the tank and body. I will have to do some small trimming on the body, but it will work good.
We received some more parts, I got the new lower ball joints, all bearings, and some other misc. parts. I also got the LSR bearing carrier in. so they just owe me the swinger. it should be here first week of Feb.
next steps are to install the swinger re-enforcement kit, then mock the front end and take it with everything on it on the front and center
(engine, tank, rad, a-arms, shock, steering and tie rods, the reason is we need the pipe modified to fir properly.) I also need to finish my front engine mount design. I have not finished designing.
Looks good. Do you have any videos of your son racing last year? I'd like to see one of these in action
oscarmayer
01-19-2015, 02:45 PM
No sorry. This is a new build and a new setup for us, but I will video some practices.
oscarmayer
01-20-2015, 11:47 PM
well finished with the final tweaking and got the bike ready to take to the exhaust specialist to modify the pro-circuit pipe to fit the ATV frame.
once he is done with it, I just need to do 1 last weld to add a nut to bolt the nerfs on the front too (each side). after that, it gets sent to the sanders then painted.
Here is where it sits.
The radiator is bigger than the motor, lol. If he over heats that he have to be really working it
oscarmayer
01-21-2015, 12:27 AM
LOL yea that's true. these MX races are fast and intense. They are literally a 20 min sprint race. going balls to the wall none stop, so I know the cooler I keep that motor the faster and more stable it runs.
we have some sponsors for coolant including engine-ice so we will be using their coolant for it. Evans is great, but with I get my stuff 1/2 the price due to sponsor discounts, cannot top that, + 1 gallon will last me for a season. haha that bike takes so little it is humorous. I may end up a at a later time putting shut off valves on each rad hose to turn off flow for engine removal and install just because there is so little fluid in the motor but tons in the rad. This will keep cut down on mess and speed up engine replacement if needed at the track side.
next week I start tearing into the "mock" motor.
oscarmayer
01-29-2015, 10:35 AM
everythign is torn back down and sent to powder coaters. Kawi bright green is the color we are doing. new nerfs, grab abd bumper as well as frame and a-arms are being done. total $450. very good deal considerign the work on the frame needing to clean it up and the arms are coated black and need to be sand blasted before re-coating. so now too bad. Oh and theya re doign the beed locks too so everything will match up.
oscarmayer
01-31-2015, 12:05 PM
ordered the new custom Boyesen rad setup with custom reeds, ordered the new fox rear shock custom spring setup.
I jsut got back the front shocks. We are using re-valve and re-spring YFZ450r front shocks. they were rebuilt and ready to go. they are much beefier than any others and will last longer, they also have every adjustability there is like all the others. so ne need to spend $2200 on fronts as these will do the same job the same way for $400 the set.
I am going to start cleaning up all the bearings and getting things ready for assembly. next week I will be rushing to re-assembly the bike for final pipe fitment. it will be it's final assembly.
Samjp22
02-01-2015, 04:46 AM
Looking forward to seeing this little monster all together
oscarmayer
02-02-2015, 11:04 AM
Tanks!
Well it was christmas time this weekend!!!!!!!!
I got the Flex bars in, boysen rad valve and spare reed set, new free standing shop size Blasting cabinet (yep now i can clena my own stuffs!!!), new 1/8" Alloy skid plate, new rear SS brake line, 2 new Kien 28MM(28.5mm to be exact) carbs, new ODI "locker" grips (black and green ordered with custom #155 A.Wichter on them).
I also torn down the spare motor and started bearing repalcement. I will have to get a shop to help remove 1 specific bearing that I cannot seem to pull out. Honestly the stocker is in great shape am I really could just leave it but I am being a panzy about it cause I wante everything new. So I will see if I continue assembly or get it replaced. His new motor will be there this week the new Sonpsor build 96CC setup and new 96cc top end fo rthe spare I am building. I'll take photos if the motor appart and parts I am using so ya'll can see the details we ho through. One cool think I discovered about Yamaha motors, They do nto sue a center case gasket, they only use sealer. That made it 1000000Xs easier to split the cases and it all come appart easily. Honda, Kawi and most others have a gasket, that causes the cases to stick when trying to split the cases and tons ofo cleanup. I cleaned the case halves in 10 min with how soapy water and plastic scrubber sinc ethere were no gaskets. Loved it!!!!!! Was the easiest rebuild I have ever done yet!
Oh I forgot to mention for the spare, I have a new SS bolt repalcment kit that uses allen heads instead of the dumb philip head screw/bolts yami used in stock. I hate them dam philip. they ALWAYS strip even with a impact driver.
Anyway, I'll take some photos and show my progress. I am goign to start updating my mikesatvfix.com site to show this build and the progress.
oscarmayer
02-10-2015, 02:05 PM
well things are comming together nicely. got everythign back from PC shop and started assembly. motor mounted, steering, harness, levers,cables etx. tonight i finally got the front repalcement a-arm bearing sets in so i will be repalcing those and installing the entire front end of the ATV tonight. LSR goofed and forgot tot hsip the swinger last week so it is in the mail today and I will have it by Friday. I will install the stocker for now as a mockup setup and later switch it out for the LSR one.(easy to do, plus give sme 2 different setups for different tracks and such)
I need to post updated photos, Promise this week sometime.
oscarmayer
02-18-2015, 11:05 AM
Well the quad is now 90% complete. Should be ready for this weekend's racing.
http://tapatalk.imageshack.com/v2/15/02/18/738f09e231544737c41ebe8c199f27cc.jpg
http://tapatalk.imageshack.com/v2/15/02/18/cf74c223b3fe669326079963beadeab2.jpg
http://tapatalk.imageshack.com/v2/15/02/18/4db14c5993898272c6e1249e182da946.jpg
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That turned out great, your son is lucky he has such a great father
oscarmayer
02-19-2015, 01:06 AM
Thanks. Still got a bunch of touchups to do. Have close to 4k in parts in this thing. But ones similar that guys have shops build have spent 15-17k so I think I made out ok.
The clutch cover will also be white once I get back and install the lost ball that sits between the shift rod and shift push end. Then I have to bleed the brakes, install hoses for cooling and all fluids. Finally a chain and some other minor things. About 5-7 hours of detailed work and it is track ready.
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Red Rider
02-19-2015, 03:57 AM
Do I see 2 rear sprockets, side by side?
oscarmayer
02-19-2015, 10:20 AM
That is a sprocket protector. Tryin to decide if I want to keep the rear skid or not. I have a rear sprocket protector and he hardly ever uses the rear break so mot sure I need the skid.
I probably will for now. But not sure if it will stay.
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Red Rider
02-19-2015, 03:04 PM
That is a sprocket protector.Yeah I saw the sprocket protector, which looks like a brake disc. I guess the sprocket is reflecting off of the shiney protector, giving the illusion of 2 sprockets.
Yes, I agree, nice job on the build.
That's crazy, it does look like there are 2 sprockets. Nice polish for a part that's supposed to take blunt force, lol
oscarmayer
02-27-2015, 10:45 PM
Haha yea.
Here is the finished quad as is at yesterday's race
http://tapatalk.imageshack.com/v2/15/02/23/29688fe9455d9213102a05e68597553d.jpghttp://tapatalk.imageshack.com/v2/15/02/27/ab2af1a5bc257fbee3610dbd161dbd5a.jpg
http://tapatalk.imageshack.com/v2/15/02/27/28c1e1d15e0b8febdda355724e279fe0.jpg
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NeverLift
02-28-2015, 12:07 AM
Very nice. How's the ride report? Does the kid love it?
oscarmayer
03-02-2015, 05:02 PM
yea he loves it. lots smoother and more stable that ever before. the Raptor chassis really is a great chassis to build from. the only thing I may do is eventually hand build a 2nd setup for a different class and use the LSR chromoly chassis they sell. sponsored I get some discounts which will help.
oscarmayer
03-07-2015, 10:31 AM
we have another race next sunday the 14th. i plan on getting some action shots and video for everyone as long as the weather agrees. the first race it was cold, wet, raining and icey so i was not about to ruin something to take lots of photos and video.
onformula1
03-08-2015, 12:13 AM
Great work!, it looks Awesome! That kid is very lucky to have a dad like you.
Now can we remove 1 or 2 of those wheels? :lol:
oscarmayer
03-08-2015, 11:00 PM
LOL. They do not allow trikes to race for now. They may consider doing up a trike mx class if we can get 5-7 dedicated riders.
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onformula1
03-14-2015, 03:33 PM
I am just playing I think quads are better for kids
atc300r
03-14-2015, 05:03 PM
You built a great looking quad.Cant wait to see the action shots and vids.
oscarmayer
03-17-2015, 10:37 PM
Thanks guys. I am working on that every time we get ready to go. I forget the gopro. Grrrr.
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onformula1
03-17-2015, 11:14 PM
We need some more pics, how about some close-ups if you get the chance. I am interested in the motor fitment.
Everytime I look at this quad it makes me wonder if Kawasaki took its hair down and built a truly cool smaller quad (kinda Like the old 250 Mohave) it should look like this. (Your color motif makes me think about a Kawasaki).
oscarmayer
03-19-2015, 04:50 PM
LOL I will get you some. My son likes Bright green and it came with a white body, so we went green and white for the colors. Turns out a nice combo actually. Motor actually fits in very nicelty with plenty of room. the YZ motor is 1/2 the size and weight of the origional then we remvoed the bigger harness assembly and battery and air box system will be removed. Total the bike will have lost nearly 40 lbs over the origional weight. we did add bigger shocks and longer travel a-arms and wider rear so that added. We estimated to be abotu 27lbs under stock weight how it sits. I am also toying with the idea of putting a smaller tank on it as we don;t need a full day's worth of fuel when he only rids 20 minute sessions at practice or racing. I have seen some alloy tanks that look as if they woudl fit pretty well. I would have to make a mount to hold it, but that's simple. I also have paint that matches the powder coating, so if i have to touch something up, i can paint it to make it cover up the area. (smart thinkin eh? ;-) )
anyway, I'll pose ya up some photos and even show the rear mount i made to fit using the stock rear mounts and added a buildin spacer to senter the engine.
i am going to be taking the bike down to a specialist to finaly get a custom complete pipe made for it. We had a make it work pipe from a YZ85 but we really need a true pipe made. I am also goign to raice the engine up on the front mounts about 1-1.5" so L can get the carb to sit more level. When I mounsted the motor, it sat on the frame and was setup to sit like it did on ht edirt bike, but once the bike was assmebled the suspensions changed that and the carb sits at a weird angle the float will not seat the needle and leaks so i had to make a custom intake for it for now. really dumb but it worked for our needs till we fix that. i had to wait to move the motor due to the pipe was build around the current angle which is now wrong. so i learned mount the final engine mounting last once the suspensions is installed with the carb so you can be 100% sure before you weld it on perm. anyway, minor change to the frount mount but no biggie.
I'll post photos of how it sits and what I did for mountings.
oscarmayer
03-26-2015, 03:51 PM
Here is a video of Son jumping his quad at practice.
https://vimeo.com/123345089
Hope this works.
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onformula1
03-27-2015, 04:53 PM
Nice little tapped out step up.
Very cool, he will be waxing the big quads is no time.
Nothing worse then getting smoked by a kid on a 80. LOL
oscarmayer
03-28-2015, 10:01 AM
Haha. It is bored to 96cc. It is down at a place getting a custom pipe build. So that will increase power 30%
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oscarmayer
03-29-2015, 10:33 PM
You know how hard it is to deal with an 11ye old calling you old coot? Some days I swear. And I swear some more!!!!
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onformula1
03-29-2015, 11:29 PM
You know how hard it is to deal with an 11ye old calling you old coot? Some days I swear. And I swear some more!!!!
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Just tell him, son-
There's old guys and bold guys.... but.... There's NO old bold guys!
oscarmayer
03-30-2015, 10:38 AM
Hahaha
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oscarmayer
03-30-2015, 09:35 PM
Today we got some packages from the sponsor. Got the spare top end setup in and I started testing prototype Cylinder Head inserts. Yes they are removable for engine tuning for the tracks.
The numbers ones are 6.5cc and 6.0cc. The non cc marked are to be tested for compression to see what works best for our needs.
http://tapatalk.imageshack.com/v2/15/03/30/51ecf68e11d03d8e3888002ca8ad38b6.jpg
http://tapatalk.imageshack.com/v2/15/03/30/7635c4c30213505f8d0bfe19b56070d4.jpg
Here is part of his clutch. We only use billet clutch hard parts. Being the YZ85 was 100lbs lighter. The stock clutch parts tend to crack or shatter over time. The billet parts work awesome and stop the breakage. During launching he revs the motor to 6-7k rpm and dropped the hammer wheelieing half way down the first straight at times. Stock basket shattered on us before so that this was the fix.
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onformula1
03-31-2015, 01:15 AM
Can you post a pic of the other side of the head domes?
oscarmayer
03-31-2015, 08:14 AM
sure. will do it tonight. you can go to www.phatheadracing.com and see them as well.
http://www.phatheadracing.com/yz80%2085.html
the prototypes I cannot as I promised no detailed photos (NDA) but the standards I can.
oscarmayer
04-04-2015, 06:27 PM
I am excited!! I get to pick the bike up Friday with the new pipe!!! Woot!!
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oscarmayer
04-04-2015, 06:28 PM
I owe you the motor mount photos I will get them next weekend.
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oscarmayer
04-16-2015, 11:37 PM
Well, good news got the custom pipe done!!! Jemco did an amazing job! I am going to have them make a 2nd one.
onformula1
04-17-2015, 12:31 AM
That is soooo cool!
I am glad it work out.
She's going to scoot now!
I it a- all around, low end, mid or top end pipe?
I can't tell from the picture.
oscarmayer
04-17-2015, 08:49 AM
It is a mid to top end pipe. We run a bit higher compression already so we get low end from that. Yea I am excited. Finally have his bike how I want. This summer we have a 6 week break. When we do I will ship the pipe down for a copy to be made. Always want 2.
I also found a place that can get some custom silicone rad hoses made. So that will also help a ton!
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onformula1
04-17-2015, 02:37 PM
It looks great, it will be nice to have a spare pipe, kinda hard to drive to a shop and pick one off the rack.
At least it didn't cost you $1800-2000 plus freight.
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oscarmayer
04-20-2015, 08:51 AM
yea no kidding right?!! LOL
ok this weekend's update:
we had a great time off the track. on the track. sucked balls....
tons of motor issues so he could not push it as it kept dyeing. the final moto on Sunday it died and would not start. We packed up and went home. So it sits in the garage all dirty from the track and today I have to wash it so I can work on it to troubleshoot it.
I will post a couple of race day photos.
oscarmayer
04-20-2015, 10:42 PM
well good news, motor is not "trashed" as thought. 2 things are going on.
1- coil grounding wire was breaking off and it would connect and dis connect causing it to cut in and out. sot he more revs the more it cut out.
2- sparkplug coil was having issues so I replaced it.
3- on trans he seems to enjoy kicking the trailprotrailprotrailprotrailpro out the shifter to go down in gears. this could be a bent shift fork. I will need to test the quad myself this week to determine if that is the case. At a $500-$600 cost to have the sponsor replace the fork or $100 in gaskets and materials and 6-8 hours of my time for me to do it either sucks if it has to get done....
KIDS!!!!!!!!
onformula1
04-21-2015, 02:48 AM
Thumbler Time?
oscarmayer
04-22-2015, 08:56 AM
I wish Rekluse made a clutch setup for the YZ85. :/
oscarmayer
04-22-2015, 09:26 PM
Decided to surprise the kid when he rides next time. ;)
http://images.tapatalk-cdn.com/15/04/22/05a3b9cc7cfa19348cd8697d4f8dcd20.jpg
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oldskool83
04-23-2015, 10:09 AM
That's awesome
oscarmayer
04-25-2015, 11:49 PM
Thanks!
I just realized the list of sponsors for my son is long!!!
Wiseco, HotRods, Lukesracing.com, Phat Heads racing, LoneStar racing, Mikesatvfix.com, EVS, Duro, Teixeira, SLMracing, Scott Sports, AXO, Boyesen, JT Sprockets, GoPro, O'Neal, Renthal, Kal-Guard, Tusk Off-Road, Suspension Dynamics, FOX racing
Holy Moo!!! Spoiled brat! :/
LOL I'm jealous!!!! :) but happy for the little crumb snatcher! He's been racin for over 5 years now.
onformula1
04-26-2015, 01:29 AM
I like the sticker, we used to get blank white stickers from Office Max and write stuff on them with a black sharpie and slap them on our buddies bikes right before the race.
My favorite was a sticker I made for my buddies, sons bike it said- Today We Will Except NO GURLY MEN! He won the race. Same kid except I wrote-
You know you get to kiss the trophy girl if you win! He won the race. Or- You know you are faster than these guys, they are only fast at video games! Another win.
Racing is fun!
oscarmayer
04-27-2015, 01:10 PM
LOL love it!
gotta try that on him too!
oscarmayer
05-01-2015, 09:40 AM
ok you are going to LOL at me, but i am already thinking about next year and the season just started!!! LOL. He is going to have to run an even bigger class next year due to age and drop the lesser one we run now. so time for a BB 105cc setup for next engine build! ;)
oscarmayer
05-02-2015, 11:33 PM
Next weekend we got another race. Bike is ready and working great now! So we are looking forward to fun!! Will post pics and photos.
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onformula1
05-04-2015, 03:51 AM
ok you are going to LOL at me, but i am already thinking about next year and the season just started!!! LOL. He is going to have to run an even bigger class next year due to age and drop the lesser one we run now. so time for a BB 105cc setup for next engine build! ;)
Here's some ideas-
http://www.ktm.com/mx/85-sx-1916/highlights.html#.VUcjp45Viko
http://www.husqvarna-motorcycles.com/en_us/motocross/tc-85-1714.html
http://www.goforwardmotion.com/superminis.php
Or I would sleeve down this- (If it's legal)
http://www.ktm.com/mx/125-sx/highlights.html#.VUckZ45Viko
or
http://www.yamahamotorsports.com/sport/models/yz125
oscarmayer
07-08-2015, 08:46 AM
when you say sleeving it down, does that mean running the longer stroke with a smaller piston? is that recommended? I am only asking because I have heard 2 different stories. 1 it works great and another is shorten the rod/stroke and leave piston size the same. then deck everything down to fit. what are your thoughts?
Toaster556
07-09-2015, 08:52 PM
I don't know how this will compare to modern 125s, but I had a 82 RM125 I rescued from a wreckers with a Wiseco 100cc debore kit. It screamed on the top end scream like a TAG kart and had absolutely zero bottom end. How it would work with a modern powervalve motor, again I don't know.
I've ridden KTM 105s before, and they're almost as fast as a KTM 125 in stock trim.
onformula1
07-10-2015, 12:52 AM
when you say sleeving it down, does that mean running the longer stroke with a smaller piston? is that recommended? I am only asking because I have heard 2 different stories. 1 it works great and another is shorten the rod/stroke and leave piston size the same. then deck everything down to fit. what are your thoughts?
You could sleeve the cylinder down, but getting the power valve (Depending on the engine brand) would be some custom work, they do it in go cart racing, but because they are set-up for top end most guy eliminate the power valve and run slugs that can be adjusted off the track.
The best way to go is to de-stroke the crank, all of this will be expensive and I would only do it if you were starting "Ground up".
The advantages would be a bigger carb, better ignition, better power valve set-up, better port set-up and reed block, stronger transmission and clutch, more parts availability, ETC.
I think you are close enough to build a 144cc-200cc engine in the future (When Austin moves up) and sell off what you have in a kit for the next up and coming racer or build a new quad and sell that one as a turn-key racer.
onformula1
07-10-2015, 12:59 AM
I don't know how this will compare to modern 125s, but I had a 82 RM125 I rescued from a wreckers with a Wiseco 100cc debore kit. It screamed on the top end scream like a TAG kart and had absolutely zero bottom end. How it would work with a modern powervalve motor, again I don't know.
I've ridden KTM 105s before, and they're almost as fast as a KTM 125 in stock trim.
You are correct, but if you make them equal and put a KTM 105 in a KTM 125 chassis and race it against a KTM 125 things change quickly!
In Europe they race 80cc-105cc engines in enduros and grass track motocross in a 125cc chassis and the rules are pin the throttle wide open, grab gears and adjust with clutch fanning. :lol:
Toaster556
07-10-2015, 02:30 AM
You are correct, but if you make them equal and put a KTM 105 in a KTM 125 chassis and race it against a KTM 125 things change quickly!
In Europe they race 80cc-105cc engines in enduros and grass track motocross in a 125cc chassis and the rules are pin the throttle wide open, grab gears and adjust with clutch fanning. :lol:
I used to live close to the Barker brothers, who imported TM Motorcycles. They had an 85 enduro like that, with Paioli forks :crazy :hammer . It was not designed for someone 6'5!
onformula1
07-10-2015, 02:54 AM
I used to live close to the Barker brothers, who imported TM Motorcycles. They had an 85 enduro like that, with Paioli forks :crazy :hammer . It was not designed for someone 6'5!
Those TM's are bad trailprotrailprotrailpro, but to get them to go at a pro level they sound like a sewing machine hooked to 480 volts and a NOS bottle for good measure! :lol:
I love TM's! that new 300 is sick!
I have talked to Oscar Mayer about TM's and a few other exotics, but he likes something you can get parts for easier, I don't blame him, I have missed a few races back in the day racing exotics, but man are they fun!..Nothing like smoking the field on a brand nobody ever heard of. Bellissimo!
Don't get me started on the Bultaco Cemoto, now Gas Gas. or the Italiano Beta's
Paioli forks, KYB internals stock, works forks! set-up with poor Euro settings.
oscarmayer
07-10-2015, 12:41 PM
we got a double race weekend next week.
Saturday is a makeup rained out race and Sunday is normal round 6. so lots of racing!!!!
onformula1
07-10-2015, 10:50 PM
^ Have fun, let me know how the DEPS works and the new carb and intake mods.
oscarmayer
07-11-2015, 05:20 PM
Went to practice today. When cleaning the quad up loonie what I discovered.
http://images.tapatalk-cdn.com/15/07/11/05612b632966eb0968a48323fc02f6ff.jpg
http://images.tapatalk-cdn.com/15/07/11/5bd8c00e8e255d0c87982e9a71f1b1d7.jpg
We got a double race next weekend. Will have to went it up and paint over it... Sucks. Never expected the frame to crack. Will need to build damper insert for the front mount to stop this from happening again.
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oscarmayer
07-11-2015, 05:22 PM
^ Have fun, let me know how the DEPS works and the new carb and intake mods.
Worked great! Very snappy and poppy!! Could feel a much faster response like night and day!!
Thank you sir for the ideas!!
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onformula1
07-11-2015, 05:24 PM
No problem any time.
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onformula1
07-11-2015, 05:29 PM
Went to practice today. When cleaning the quad up loonie what I discovered.
http://images.tapatalk-cdn.com/15/07/11/05612b632966eb0968a48323fc02f6ff.jpg
http://images.tapatalk-cdn.com/15/07/11/5bd8c00e8e255d0c87982e9a71f1b1d7.jpg
We got a double race next weekend. Will have to went it up and paint over it... Sucks. Never expected the frame to crack. Will need to build damper insert for the front mount to stop this from happening again.
Sent from my iPhone using Tapatalk
Wow grind weld and gusset those areas.
You could probably touch it up with Kawasaki KX PJ1 spray paint
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