I just bought a yz250 (2001) AND NOTICED THE HANDLE BAR VIBRATION IS TERRIBLE!! Is this normal with this year or might there be a problem. If it is normal what can I do to lessen some of the vibration. My last bike was a 99 kx250 and had no where near the vibration.
Keep in mind that your kx had rubber mounted handle bars as yz has a solid mounted top triple clamp, assuming it is stock. You may want to look into 1 1/8" bars without a cross bar as they help due to flexing.
if your having extreme vibration your main bearings may be going bad.when was the last time the motor was rebuilt?you can check the condition of the bearings by trying to move the flywheel up and down and side to side.if you feel any movement the bearings are toast
Thanks for all the help but I called LSD Racing (Larry Dukes ) and he said to check the engine mounts to see if they are loose. Sure enough, 1 was a little loose, so I put the torque wrench to it and all is good!!