Seller notes

YFZ450R YFZ 450R 98mm Big Bore 5mm Stroker Rebuild Kit Hot Cams Valves Complete THE BIGGEST BADDEST BIG BORE STROKER ON THE PLANET - 520cc!FITS ALL YAMAHA YFZ450R FI MODELS AND YEARS98mm BPR big bore cylinder+5mm CUSTOM BUILT Crankworks stroker crankWiseco JE or CP forged big bore piston**Hi-temp piston ringsChrome wrist pinCirclipsStage 3 Hotcams intake and exhaustKibblewhite valve spring kitKibblewhite stainless intake and exhaust valvesHead stud kitCrank bearingsTransmission bearingsShift cam...

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