Maintenance & Technical > KX500 Original

Is this piston good?

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JustinSB:
It looked to me like it started to seize, but I thought it might just be carbon because it is in the areas which line up with the exhaust ports. It is a cast piston, which bothers me. Any comments are appreciated. Thanks!

cyclepsych0:
From the photos, the scarring seems excessive... If it were my bike I'd definitely replace the piston and check the nikasil coating for any flaking. 8-)

KX500freak:
yes same here ,and replace piston earlier next time ,this one seems almost polished :P

JustinSB:
A new one is going in. I just got the bike. I'm glad I caught it before it was worse and did cylinder damage or disintegrated.

flyin9:
were your rings welded in the gap or do they move freely? looks like you KIPS are very gummed up or not operating correctly, or both. JMO
Jared

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