KX Riders
Maintenance & Technical => KX500 Original => Topic started by: wreck-n-roll rik on August 28, 2008, 04:54:24 PM
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I am the new owner of a 1998 KX500, and new/old to dirt bikes in general so I need some help. I'm not familar with this motor yet. It is making a top end low-tone rattle. The prevous owner did not have a crush gasket in the head to pipe, and only one o-ring. I like to go through new toys whe they are used, so I put in the gasket/o-ring/new springs... This is when the noise started, so I took the gasket out but it still makes the sound. Any Ideas on what it could be? I also cleaned the carb and replaced the plug and put in freash gas (91 oct.). :?
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i had a noise like this it was my exhuast springs touching the pipe as vibrating, i put somw heat proof hose over mine and it went away.
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If the KIPS valves are worn some they can make a light rattle noise. High temp silcone works great on those pipe o-rings and adds some dampering.
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Thanks for the suggestions - I'm going to get a manual and this week-end and really get into this thing. Not a lot of time to left ride here in Northen Minnesota so this winter the Bike will go through some major rebuilbing... Sure is a powerful bike, scared the cr@p out of me when I test a test ride.
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On my 04 kx500 the funny noise was caused by the upper pipe mount. This is on the right side of the bike . The frame broke out and at certain RPM the broken mount would vibrate against the frame. When I first heard it I thought the KIPS was rattling. I now have learned whenever I hear a noise like this, it is related to pipe mounting.
I also had issues with springs falling off, when using the stock pipe. With the stock pipe I used shorter springs from an orange bike. With the FMF pipe, the stock springs seem to stay on.
John