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  1. Top and bottom end rebuild

    YFZ450 & YFZ450R General talk
    So, I just bought a 2005 yfz450 for Christmas (2 weeks ago) The seller told me it was never rebuilt and that it was always riding on trails. Unfortunately for me, I was just putting around my yard and it blew my piston. When I had taken my top end off I found that my piston was in 5 pieces and...