350x Motocross Build - Pushing the Limits

[xrider]

I finally am far enough on this project to get a build thread started, so here it goes. I decided over the winter that I wanted to build my 350x into a motocross trike. This will be my last full trike build for a long time so I am going all out on this one and modernizing the chassis as much as possible to utilize off the shelf parts. The frame is in its final stages with Mike at HRE being fully gusseted and having TRX450 rear suspension linkage mounts added. HRE is also making a custom +2 swingarm which has the 350x pivot end mated to a TRX450 rear end. For the front end, I decided to go with Jason Hall’s Inverted Fork kit, running CR125 forks. The motor is a 425 Big Bore (Four Stroke Tech) matched with Webcam’s mid level cam (.370 lift, 250 deg duration at .040", and lobe centers at 109 deg). The exhaust came from NOS_350x and is made out of stainless steel and was custom made to my motor specifications. The rear end (axle, carrier, brake lock nut) are all Lonestar racing. I have parts coming in almost every day for this build, so I will be sure to post plenty of pictures along the way. As with most of my builds, this will be dyno tuned and I will post the charts at the completion of the project. Thanks for looking, xrider

http://i737.photobucket.com/albums/xx18/zwaylo/DSCN0465.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/DSCN0466.jpg
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http://i737.photobucket.com/albums/xx18/zwaylo/DSCN0471.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/DSCN0475.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/DSCN0474.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/Motor.jpg

[just ben]

looks like you have some very nice parts to work with.I can't wait to see it done

[HondaRidr]

Wow. Should be killer when its finished!

[Jason125m]

Will be following this thread VERY closely. Looks like its going to be a killer build!

[jays375]

How do you get the Jason Hall stuff?Looks like you are definitely going all out!With all top shelf parts to boot!Should tear it up pretty good!Very nice!

[ceaserthethird]

Looks like a Beast will be born, Keep us updated with lot's of pic's!

[motoman1012002]

that head pipe is a work of its own

[BWard]

Very nice build here,I Like It !!!

[whyzee]

This is going to be great. Keep those pics coming.

[oldskool83]

i saw your frame yesterday at hre. looks good.

[oscarmayer]

can you give more details on the cr125 front end setup? i'm interested in it and how it works and the parts. i think I would like to do that to my 350x. I'm gonnan get it running and then start saving for parts for this sort of a setup.

[userj8670]

Outstanding!!!!

[oscarmayer]

how big is that pipe? diamater wise?

[the great gazoo]

Holy insane header! Awesome pipe, man. Can hardly wait to see how much your frame looks like mine......................

[RideRed250R]

i think she'll run good...

[WIkid500]

Very nice!

[xrider]

how big is that pipe? diamater wise?
I'd have to check next time I am up at the garage. It's definitely huge, but was built for the motor. The entire exhaust is a work of art, can't wait to here how it sounds with it. I'll try to get pictures up of the muffler and midpipe as well.

can you give more details on the cr125 front end setup? i'm interested in it and how it works and the parts. i think I would like to do that to my 350x. I'm gonnan get it running and then start saving for parts for this sort of a setup.
The CR125 front end setup is part of a kit that Jason Hall offers. He can set up the triples for a few different kinds of forks. I went with the CR125 forks because they are easy to find for a good price and can be ran full length on a 350x with an extended swingarm. Shoot Jason a PM and he can give you some more details.

[oscarmayer]

thanks man! yea i was curious on the size, but cause if it's too big it could cost you low end performance was my first thoughts.

[xrider]

Mike at HRE sent me some pictures of the frame. Check it out.

http://i737.photobucket.com/albums/xx18/zwaylo/350xgussets002.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/350xgussets003.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/350xgussets006.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/350xgussets010.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/350xgussets011.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/350xgussets015.jpg

[userj8670]

I can't wait to see the finished product!

[xrider]

Swingarm is done!
http://i737.photobucket.com/albums/xx18/zwaylo/052.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/050.jpg

[TrailerRider]

:drool::drool:

[oscarmayer]

your stuff just looks awesome!!!! I really liek the direction your going.

[BWard]

Nice, Real Nice

[dirtjunkie85]

Very nice work. I need to find me a project like this of some sort.

[ustin666]

can't wait to see it done

[userj8670]

Yep! That's sick:w00t:

[TrailerRider]

Any new updates :)

[xrider]

Nothing too much. Got the races changed over in the frame for roller bearings and got all of the parts ready for powdercoat. I should have everything shipped out to the coaters this week.

[Tri-Z 250]

^^ suer is fine work, but man you couldn't take 10mins to wash the frame?:rolleyes: I'm sure HRE has seen it all...Love the fact he ain't washin-it either.

[xrider]

The frame is back from the powdercoaters, the color is Dormant Purple. Time to start assembly. I'll snag better pictures of it this weekend.

http://i737.photobucket.com/albums/xx18/zwaylo/2012-06-2095163815.jpg

[yaegerb]

That color is sick!

[BeersBuds&Mud]

one eye 3wheel flying purple people eater!!! i love the color!!:naughty:

[sinsayers]

oh my what a ride man... This thing is going to be beautiful in the sunlight. Great work my man

[xrider]

A little progress. Had the wrong shock linkage for the rear, so the strut is just holding it in place. It should be a roller by the end of this week.

http://i737.photobucket.com/albums/xx18/zwaylo/0707121217a.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/0707121230a.jpg

[Scootertrash]

Nice stuff there!!

[Billy Golightly]

AWESOME Looking!

[BeersBuds&Mud]

:Bounceit looks so good alright!! keep up the great work bruddy!!!:drool:

[countrybumpkin]

Looks AWESOME so far!! i stared at the pics until my vision was blurry!!

[userj8670]

and im stiff....anything new with the motor? I cant wait to hear it!

[motoman1012002]

I love the frame color so you think its gonna hang with the tpc

[xrider]

and im stiff....anything new with the motor? I cant wait to hear it!

The motor is done and ready to go. Just have to get it installed.


I love the frame color so you think its gonna hang with the tpc

That is the plan. At the very least, I will have as good of suspension as they do. I should be putting down decent power as well.

[WIkid500]

Oh Mama! That is one fine piece of engineering! Sharp lookin machine man, keep up the awesome work!

[motoman1012002]

So are you running a dual oil cooler to

[motoman1012002]

How's the chain line up to

[xrider]

I will be running a single oil cooler and chain alignment is excellent. Thanks, xrider.

Getting Closer!!! More detailed pictures will be up this week.
http://i737.photobucket.com/albums/xx18/zwaylo/0728121457.jpg

[motoman1012002]

It is looking good in fact is.like.to see how well the suspension works out for ya

[BeersBuds&Mud]

looking damn good!!!!:beer

[ATC-Eric]

Dig it!!!!!

[motoman1012002]

Are you running a air box

[jon jon]

what forks are u running?

[xrider]

The forks are from a CR125. Haven't made my mind up on an airbox or not. This will only be a track machine, so I might not run one.

[userj8670]

I love the custome pipe! Its so meaty looking and adds to the aggressive stance to the bike.

[xrider]

http://i737.photobucket.com/albums/xx18/zwaylo/250.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/248.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/246.jpg

[IKE-Z]

I like that color more and more every time I see it.

[motoman1012002]

Smart going with the axis for the rear I've never had luck with elkas pep for Tt and axis for motorcross it does look good

[motoman1012002]

Did ya add some more black to it this weekend

[atctim]

Hey XRider. I LOVE this machine - absolutely awesome. Just something to think about. If this is a "track only" bike - you'll need different rear wheels. You'll bend those in your first race without a doubt. I have mushroomed so many 10" wheels without reinforcement rings that I can not count them. Just a heads up - otherwise totally mint build!

[xrider]

Hey XRider. I LOVE this machine - absolutely awesome. Just something to think about. If this is a "track only" bike - you'll need different rear wheels. You'll bend those in your first race without a doubt. I have mushroomed so many 10" wheels without reinforcement rings that I can not count them. Just a heads up - otherwise totally mint build!

Thanks Tim, It's coming out better than I expected. The rear rims and tires on this right now are off another 3 wheeler of mine. I have a set of 18 x 9.50 - 8 fast trakkers on 8" baja style rims that I will be using on this one.

[motoman1012002]

Any updates on how she runs

[xrider]

The tuning will be starting this week as I was able to finish up the trike this last weekend. I am waiting to have the tank painted until after the tuning is finished, then the final pictures will be posted! I can't bring myself to post pictures of it with the old tank mounted.

[motoman1012002]

So are you running a long travel rear shock

[jsmay]

Killer man!!!!!

[xrider]

So are you running a long travel rear shock

Yes, I am using the Lonestar DC-6 Linkage with a Dual Rate Long Travel Custom Axis rear shock.

[kiser]

Man that thing looks sweeeet!!! Cant wait to see it done!

[oscarmayer]

truely a very nice build!!!

[BWard]

A Beautiful Piece of 3 Wheeler Art
WOW

[xrider]

Thanks guys. Trust me, the final pictures will be worth the wait.

[oscarmayer]

/me taps fingers on desk... i'm waiting!!!! :p

[xrider]

Update!
Was able to get the airbox to work with the 39mm FCR carb. Looks almost factory. Initial dyno runs are showing a little over 38 hp at the rear wheels and that is on 92 pump gas. I'll post the final dyno charts in a few days!

http://i737.photobucket.com/albums/xx18/zwaylo/Capturea.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/Capture.jpg

[TatTooL23]

38 at the wheels?? Wow that's hard to believe but really awesome if its true.

What's left?

[Mosh]

38 HP at the wheels is impressive, not too mention that 4 stroke torque.

[userj8670]

Thats amazing!!! When do we get videos???

[xrider]

Here are the numbers! 38.40 HP and 29.17 ftlbs of torque.

http://i737.photobucket.com/albums/xx18/zwaylo/Curve.jpg

[HondaRidr]

Thats awesome! Cant wait for completed picts.

[JasonB]

nice numbers man!

[zmpolaristech]

Wow man, 38hp is impressive out of a 350X, especially at the rear wheels!! Should be a nice track bike. GOBS of tourque!
Nice build man, and I aint no Honda guy.

I did tell some friends that "if I thought my wife COULDN'T RIDE, I would have put her on a 350X instead of a Z!" Lol.

Realy though, AWSOME BUILD!

[TatTooL23]

Wow. That is really crazy. My friend is almost done with his 492cc with a 40mm FCR in his 350X. Makes me wonder what he will be getting.

Also did inverts but with a(our) "new" set of triples and 450r inverts and an extended swingarm with an elka stage 5 set up with a linkage.

[xrider]

Thanks for all the good comments guys. Not too much left to do on this. My tank is currently at the powder coaters getting finished. Other than that, just a few odds and ends and some decals and this one is complete!

[xrider]

Almost complete! Basically just need to bolt on a tank it is good to go. It will be a while before the tank is complete though as it is being custom made. Might do some suspension work as well. Other than that it is pretty much done

http://i737.photobucket.com/albums/xx18/zwaylo/DSCN0581.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/DSCN0589.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/DSCN0593.jpg
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[Xowner]

Good LORD that is PURTY! I smile every time I see one of my 10 inch wheels on these AMAZING BIKES!!!

[partsmaster]

That is one fine lookin scooter!

[userj8670]

hell yes!! suhhhhweeeet

[G-Ram]

:drool: beautiful!

[Bryan Raffa]

YAMAHONDAMAN That bike is Spanking!!!! wow!

[tanks350x]

That thing is sharp!!

[Tecate performance]

Sweet build, looks awesome. Just curious, do you have any other dyno numbers from other machines from that dyno, like a new 450 or something?

[aldochina]

get the tank done yet? very nice build indeed! bet it rips!!

[the great gazoo]

Holy crap! I can't wait to see what it looks like with a tank. Very, VERY nice..................

[Kintore]

That is a BEAUTIFUL looking 3 fiddy, well done good sir. I want to see some video, bet that thing is gunna tear it up!

[Hippie459MN]

Wow! That looks amazing! I cant wait to see it with the tank on there.

[xrider]

Went with a black plastic fuel tank in the short term, until the aluminum one is finished. First race will be April 7th at Briarcliff! Heading back to the garage this coming weekend to install a new petcock and put some good time on it.

http://i737.photobucket.com/albums/xx18/zwaylo/20130322_191949_zpsa436017d.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/20130322_191930_zps8ae18780.jpg

[Louis Mielke]

Make a vid! I want to hear the thunder!

[yamaha225dr]

Man, that is a sweet ride!

[yaegerb]

I really like how that frame pops in the sunlight. Another excellent build sir.

[200x newby]

Love the color on the frame! Are you in Wapak, Oh? If So your just down the road from me I'm up in Lima.

[kiser]

Holy crap that is sharp!! I hope I get to see it in person sometime! Very nice build!!!

[taiterator]

Absolutely beautiful! Top notch build man. I'm wanting one for myself now. Cheers!

[stroberts22]

Nicest 350x ever.

[Bilster]

Love the front suspension!! Great job!!

[aldochina]

very nice bud! Love the girth on that headpipe!! I second a sound bite!!

[xrider]

Thanks for all the great comments guys! The inaugural ride will be this saturday, can't want to finally ride this beast. I'll be sure to snag a bunch of pictures before I do. I would like to thank HRE, Jason Hall, Knobbies motorsports, NOS_350x, Xowner, jswinehart, LSR, and Cosmic Quads for all the help and components on this build as well as Dirtcrasher for the inspiration from his build. I was really shooting to take this one to the next level and couldn't be happier with how it came out.

[xrider]

Well on the way to Briarcliff for the inaugural motocoss race for it, we lost 3rd gear in the truck. Had to have our neighbor come pick us and the trailer up in Columbus, LOL. Looks like the first race won't be until May 27th. I did get to take it for a good ride when we got back and couldn't be happier with the handling and power. Here are two pictures out by our pond after a short ride.

http://i737.photobucket.com/albums/xx18/zwaylo/20130406_182223_zps8ae8b135.jpg
http://i737.photobucket.com/albums/xx18/zwaylo/20130406_182212_zps719af29c.jpg

[Hippie459MN]

That thing looks amazing!!!!! I love it!

[zmpolaristech]

That X looks absolutely AMAZING man!! Definately the best looking, and probably performing, 350X ive seen to date. Nice work!

[KgoX]

It's been a while since I have read the thread from the beginning, did you mention the suspension travel? if not how much travel does it have front/rear?

[xrider]

That X looks absolutely AMAZING man!! Definately the best looking, and probably performing, 350X ive seen to date. Nice work!
Thanks! I couldn't be happier with how it came out. The suspension, handling, and power are better than I imagined.


It's been a while since I have read the thread from the beginning, did you mention the suspension travel? if not how much travel does it have front/rear?

I believe the front is 12" of travel. I would have to check on the final result of the rear.

[3or4wheels]

Very nice indeed,what rear tire and wheel size combo have you got there?

[motoman1012002]

did you ever get the tank done

[tanks350x]

The finished product is nice but, I woulda powdered the engine.. JMO

[dmfaulks85]

I love it already!

[Blizzard420]

Xrider, did you ever get that tank built for this?