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I was out riding the yz today, just casual riding, and was climbing this hill, hit a jump at the top, when i landed motor quit and went knock knock knock, :lol::banana::banghead::eek::banghead:;):lol::foul::foul:certified mech replaced top end, transmission not very long ago, so thinking i might have blown a valve? how much money? is there valve rebuild kit out there, or do you have to order everything? I think it might be one of the exhaust valves, but not sure, replace intake and exhaust together?

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