Maintenance & Technical > KX500 Original

loud engine noises up front, normal.?

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Rowdy-Yates:
Rattle??? My bike does almost the same thing but it sounds like the piston slapping i was thinking about tearing it down. But i also lost a spring for the exhaust i think ill try a 3.00 fix before i rebuiled eh?

fast500#12:
you'l deffenatly know if your piston is slapping. while you are riding shift in to 5th and let the rpms drop down pretty low and then pin it. if you hear a loud clatter from up front your piston is a bit sloppy in the hole and you should take it easy back to the truck and load her up and take it home and rebuild it.

machine:
Check the "O" rinigs, copper washer, and springs on the exhust!
Or even better, just replace them all!  :!:

jdv500:
d--n that was cool,, i glanced at this post a few minutes ago and went away to finish a show.came back in here to give an update, when i got back here to it, machine had touched on the exact thing i was going to mention.
i finally recieved/installed the 2 o-rings and large metal crush ring for the exhaust chamber, no more rattle.!!! appearently it was reverbing back and forth against the springs/ cylinder port. i reused the old o-rings/ brass washer, a month or so ago after the new piston went in.  had an awesome ride in the hilly, washed out trails today. ,thanks , enjoy, jdv

Rowdy-Yates:
LOL JDV I just replaced my O rings and copper washers. Got new springs, Fixed my Broken top motor mounts.  Have not started it yet but I am guessing mine will be cured. It seems I had most all of the probs people were mentioning.

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