rr4406pak
08-10-2004, 08:53 PM
Hey EXRiders!
I have a strange problem with my 2001 400EX that has recently surfaced:
When I am at high RPMs winding out the gears I get a high frequency vibration/rattle, but only at high RPMs. It feels like it is vibrating in the engine because you can hear it and feel it.
The quad is totally stock and starts perfect and runs perfect. Lots of power. Oil was changed regularly and is full. Have never adjusted my valves and the valvetrain does not sound noisey when running. Clutch is stock.
The quad has ran perfect since I got it a year ago and the problem has just come up the last few rides.
I don't think it is the rev limiter because I don't think I'm reving it THAT high.
The problem is hard to describe here so please let me know what details you need that I have not given you already to help me diagnose this annoying problem.
Thanks,
Keith
Marion, NY U.S.A.:(
I have a strange problem with my 2001 400EX that has recently surfaced:
When I am at high RPMs winding out the gears I get a high frequency vibration/rattle, but only at high RPMs. It feels like it is vibrating in the engine because you can hear it and feel it.
The quad is totally stock and starts perfect and runs perfect. Lots of power. Oil was changed regularly and is full. Have never adjusted my valves and the valvetrain does not sound noisey when running. Clutch is stock.
The quad has ran perfect since I got it a year ago and the problem has just come up the last few rides.
I don't think it is the rev limiter because I don't think I'm reving it THAT high.
The problem is hard to describe here so please let me know what details you need that I have not given you already to help me diagnose this annoying problem.
Thanks,
Keith
Marion, NY U.S.A.:(