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WTF happened


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lean=heat and lack of coolant, or coolant flow=heat. you have already taken it apart, so i would just go ahead and rebuild it. when you get it back together do a leakdown and check the water impeller. if it's a stock plastic impeller it may be in several pieces depending how old the bike is.

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definately see ring snagging on both, and deto on the one. did you gap the rings? check bore clearance? looks kinda lean, too. a lot of baked-on oil. could have been oil separatoin, air leak, or simply jetting. did you account for cooling temps? need more info

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