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19 20 Yamaha YZ450FX YZ 450FX 102mm 500c DRAG RACE Athena Big Bore Kit CP Piston
Athena / CP Carrillo / AZ Quad Parts Conglomerate Kit. 102mm 500cc Big Bore Cylinder Top End Kit! This Is The Best Big Bore Kit On The Market! Fits Yamaha YZ450FX Dirt Bike Models. Years 2019 And 2020 ONLY.
102mm 500cc Nikasil Athena Big Bore Cylinder. Larger Water Jackets Keep Your Motor Cooler! CP Cariilo Piston Kit (Includes, Piston, Pin, Rings & Clips). 14:1 Compression Ratio (Race Gas ONLY).
Athena Complete Top End Gasket Set. Must be installed by a qualified professional and dyno tuned for proper AFR. We highly recommend this kit be used with a Carrillo rod and a properly built crankshaft.