Maintenance & Technical > KX500 Original
Piston oversize and compression
teamgreen500:
I'm on my second or third set of rings on this piston (2nd piston). I'm lucky enough to have REALLY good assistance in these matters. In other-words: I let a real engine builder tell me whatr I need and when.
Manny
sdkx500:
So I pulled out my old inherited compression tester.....busted! Went out and got another.
I read the directions on the package and it says to take compression on a warm motor. The clymer manual also says to take compression on the warm motor with the throttle held wide open. I took a cold compression test of 92lb. I will take a hot one and post the difference in case anybody is interested.
Paul:
--- Quote from: sdkx500 ---So I pulled out my old inherited compression tester.....busted! Went out and got another.
I read the directions on the package and it says to take compression on a warm motor. The clymer manual also says to take compression on the warm motor with the throttle held wide open. I took a cold compression test of 92lb. I will take a hot one and post the difference in case anybody is interested.
--- End quote ---
Low service limit is 110. You need a topend ;)
sdkx500:
Paul is that a cold or warm compression reading?
Paul:
--- Quote from: sdkx500 ---Paul is that a cold or warm compression reading?
--- End quote ---
Warm, always @ normal operating temperature.
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