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
Jay Clark EnterprisesMotocross to the Extreme |
2010 CRF450R for PU
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!
MXA Project YZF450
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!
Got it this time
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.
Johnny gave it a great shot!
He came up short the Sunday before the National on a section they ended up taking out for the race. Bummer deal—
FMX Best Whip Champion Honda CRF450R Race Bike
We tried for the last national but go hurt so had to go Johnny Jeldera.
Pivot Works Watertight Wheel Collars
These come in the already proven wheel bearing kits and have an o-ring on the inside diameter of the spacer so that no water gets in to the axle/bearings.
Honda’s Proven TRX 450R with a Cylinder Works Complete Big Bore Kit
A simple drop-in kit that really works!!! Combined with a Hot Cam and FMF pipe.
TWMX project by CV4, FMF, Hot Cams and CP
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.
FMF Got A New FI Harley For Project Bike!
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.
 |
Copyright © 2026 Jay Clark Enterprises |