Maintenance & Technical > KX500 Original
Engine noise
hughes:
New 0-rings, New springs, new washer and rattle is still there. I have checked everything to make sure it isn't somthing unrelated. This rattle is at idle only right at the the cylinder area. When installing my power vavles my manuals say lube them with moly lube I had to use white lithum grease. Would this cause these valves to rattle :?: I ran right at 3 tanks of fuel through her this past sat. That makes about 6 tanks ran through her with no problems. I have checked the cylinder and piston through the pipe area four times after riding everything looks good. The noise is high in the cylinder not in the crank case. Any help. Thanks
hoopty:
Does it sound like a can of marbles?
teamgreen500:
It may be a harmonic effect created by all the moving parts in the motor.
Make sure you're not hearing the clutch basket or something-else resonating. Does it do this when you pull the clutch in?
Even the trannies can be noisy.
hughes:
I guess you could say it sounds like a can of mables. Yes, still rattles with clutch pulled in. Maybe it's nothing to worry about because she running strong with no signs of the noise getting louder. I just don't remmber this sound until I replaced the top end. This bike is an 87 500 the piston had a single ring I installed 88 or new kit where the piston has two rings. Could the sound be from the second ring :?: (wild guess)
ebers17:
Hey, I just changed my pipe, from a stock one to a fmf burly pipe. When i had the stock pipe on, it wasn't sealed properly, and i never noticed the knocking noise. Now, with my burly pipe on, i sealed it up with the high temp rtv cement stuff. I started it up, and i hear a knocking noise like i've never heard before, its coming from the cyclinder it sounds like, possibly bottom end? I ran it a little bit and it ran fine, so i even did a hare scramble today at it ran great, so i dont know what to look at. Did it do something when i sealed it up? - Seth
-reknelb, shouldve went to jasper today! it was a blast of track, alot of open field and some tight trails!
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