CP Pistons brand Yamaha YZ450F FULL RACE forged piston and gasket kit. For use in high performance and racing engines; for use with a standard size bore of 95mm; and stock stroke of 63.4mm; 13.75-1 compression ratio; kit includes light weight piston; light weight piston pin; piston rings; pin lock rings and top end gasket kit. Fits 2003 2004 2005 models. This full race model piston is a single compression ring and oil control ring, high compression, lightweight piston which features a highly efficient dome design that maximizes squish without compromising performance. Lateral gasports are added to maximize ring seal while a skirt coating is included to provide additional lubrication, minimizing friction in extreme conditions.
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