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06-09 Yamaha YZ450F YZ 450F 500 Big Bore STROKER Cylinder CP Piston Hotrod Crank
Athena / CP Carrillo / AZ Quad Parts / Hotrods Full Motor Stroker Rebuild Kit. 98mm 500cc Big Bore Cylinder Motor Rebuild Kit! This Is The Best Big Bore Kit On The Market! Fits Yamaha YZ450F Dirt Bike Models. Years 2006 2007 2008 2009. 98mm 480cc Nikasil Athena Big Bore Cylinder. Larger Water Jackets For Better Cooling!
CP Carrillo Piston Kit (Includes, Piston, Pin, Rings & Clips). 13.5:1 Compression Ratio. Piston Kit Will Handle Up To +2mm Bigger Valves!
Athena Complete Top End Gasket Set. Hotrods Heavy Duty STROKER Crankshaft & Connecting Rod.
It will work with your stock head and valves.