Motocross to the Extreme
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Jay Clark Builds a Mail Order CRF250R for the Pages of Transworld Motocross:
Check out this Jay Clark Built CR125 Project Bike: Motorcycle USA Story: http://www.motorcycle-usa.com/374/10557/Motorcycle-Article/2003-Honda-CR125—Craigslist-Killer-Project.aspx Motorcycle USA Video: http://www.motorcycle-usa.com/1190/Motorcycle-Video/2003-Honda-CR125-Craigslist-Project.aspx
Check out this cool little race quad we helped with for a young lady from Riverside. Look for the full test in the next ATV 4 Wheel Action magazine.
Click on the cover for full story Jay Clark Built CRF250X Cover Check out the video about the Project
The new CRF250R’s are fuel injected and a complete new engine. Travis at Thumper got one to 280cc with a big bore and a stroker version out to 300. We did the 264cc version here. Tested one day at racetown and one at Piru and had about eight different test riders all love each of
Parts Unlimited magazine got to test the best mods on a current CRF450R– Hot Cam and high comp piston. Josh Brown for testing riding and Kenny Jones shooting the pics. Came out great!
Tom Morgan at Hot Cams came up with great cams and mapping to put this mod on top of MXA’s mini-test a few months back!
Last minute Hot Cams got Kiniry to fly out from New York state and give it a shot and see the Racer X project bike through.
He came up short the Sunday before the National on a section they ended up taking out for the race. Bummer deal—
We tried for the last national but go hurt so had to go Johnny Jeldera.
A simple drop-in kit that really works!!! Combined with a Hot Cam and FMF pipe.
Great mod by Travis at Thumper!!!!
Last year we went for the 470 big bore but this year we kept it stock bore and hit a homer with this full CV4 mod.
CP made the Custom pistons, Race Tech took care of the suspension and Bennetts Performance put it all together. FMF made custom pipes with self tuning Dynojet power Commander. Will be in Cycle World shortly.
Fits all current YZF250’s and either the cylinder big bore kit alone at 269cc or stroker to go to 284cc — This one was for Moto USA
Transworld Motocross just tested the latest beast I created. Fast Core Mods did the head Work, Millennium the big bore cylinder and CP the high compression piston.
280cc big bore with a CP Piston, FMF Pipe, Millennium Cylinder plating and Thumper put it all together for Cycle World.
Brian at SRC worked with Thumper Racing to make the fastest thing we have ever riden. Josh in his Fox gear is a Quad pro now!
Stock is 76.8mm and big bore is out to 79mm making it 264cc and the results are great! Big power gains for low cost in the new CRF250R with no fuel mapping changes.
The Honda 400 motor is proven but can just use a bit of a boost from a cam and piston. Hot Cams and CP took care of that with a FMF pipe.
Adam Booth from Dirt Bike came out to C&L in Iowa to see the plant and ride the Tom Morgan modified 2010 YZ250 into a 284cc
150cc kit with a Hot Cam and FMF pipe rips and will soon be in Cycle News.
The same for nearly 20 years the Blaster can use some extra power and Dirt Wheels will have this quad in very soon.
Custom CP Piston matched up to a Thumper Advanced Sleeve. Travis at Thumper got this running really good and way more power than stock.
Joe Kosch at 4-Wheel ATV Action just snapping some pics of ATV Pro-to-be Russell Wayman on the built 700XX. Look for this soon in 4 wheel.
Fast Core Mods did the full head work and Hot Cams brand new stage 3 cam went into the 469cc Millennium cylinder. FMF Pipe and some serious polishing. One trick 09 Honda CRF450R (well 469cc) We will see this on a TWMX poster coming up soon.
Check out the upcoming August issue of Motocross Action Magazine to see a full test on the 09CRF450R made into a 469cc monster. Great help on this project-thanks to all and especially Tokyo Mods. Just saw the article and not as good as I would like as they felt we had too much bottom end.
FMF Polaris 450 project with Fox Shox — came out great. Cain was very impressed with the mucho power.
Here is a pic of the Hot Cams, CP Piston powered LTZ250. You’re not too impressed well there are not many parts for these quads out there and now there is a good kit to power up your wife or daughters quad.
Dirt Bike Ron Lawson, Tom Webb and Adam Booth all enjoyed my 4 250F 2mm over project at Racetown
For this TWMX project we built up a CRF250R into a full blow Arenacross pro level race bike. I didn’t of course have a full blown pro level Arenacross racer so we did the best we could and kinda did a extreme home make over and let made the dreams of a kid from the