CP Pistons brand Yamaha YZ450F 468cc forged piston and gasket kit. For use in high performance and racing engines; for use with a +2mm big bore of 97mm; and stock stroke of 63.4mm; 13-1 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 model YZ450
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