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Need Piston Help

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I own a 2001 yamaha yz 125 and the bike acted weird so I took it apart and the piston was chewed up so we just bought a new wiseco piston and 4 months later the bike had no compression when I was trying to kickstart it so I took it apart and the piston had a hole in the side of it where air was escaping between the piston and the piston ring, so before I spend another $150 on a another piston will somebody please tell me why the bike keeps ruining pistons.

Thanks

Justin

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sounds like time to find a mechanic... she's got a problem ... might be tough to do over the internet

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post some pics to be sure of whats going on here. but it sounds like a detonation or air leak issue.

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