View Full Version : motor makes weird noise
2004-400ex
06-27-2006, 09:16 AM
the motor sounds like its vibrating when i let off the gas. as soon as i let off after about half throttal it sounds like a vibrating noise for a few seconds. i looked at everything that would vibrate found it to be coming from the motor.
if anyone has any info i need it fast
250x_kyle
06-27-2006, 06:02 PM
waht do u mean by vybraiten it could be the cam chain or valves
exrider008
06-27-2006, 06:10 PM
Originally posted by 2004-400ex
the motor sounds like its vibrating when i let off the gas. as soon as i let off after about half throttal it sounds like a vibrating noise for a few seconds. i looked at everything that would vibrate found it to be coming from the motor.
if anyone has any info i need it fast
my friends does the same thing:confused: someone help us out.
pnut420
06-27-2006, 08:37 PM
Well its hard to tell without riding, I doubt a cam chain or anything would be bad on a 04. I think a few 04 ex's or around that year had a problem with the harmonic balancer. The ex's always have a little vibration and clicking noise in the heads but its its louder than normal Id get it checked out.
exrider008
06-28-2006, 07:35 AM
my friends is a 99 so it is prob the cam chain. would that make that sound or is it something else
pnut420
06-28-2006, 10:45 AM
Originally posted by exrider008
my friends is a 99 so it is prob the cam chain. would that make that sound or is it something else
Could be that or the valves need adjusted. 99 is pretty old now though so it probably wouldnt be a bad idea to replace the cam chain and check the valve clearances. Also the cam tensioner could be going bad.
2004-400ex
06-28-2006, 02:03 PM
i think i might tear it down my self and if its screwed then time for a 440 big bore
Zeppelin03
06-29-2006, 01:12 PM
this probaly isnt your problem but mine used to rattle when i was about mid throttle and it was the head pipe and the heat sheild that were loose
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