CP Pistons brand Yamaha YZ450F forged piston kit. For use in high performance and racing engines; for use with a big bore +3mm size bore of 98mm; 478cc; and stock stroke of 63.4mm; 13.5-1 compression ratio; kit includes light weight piston; light weight piston pin; piston rings and pin lock rings. Fits 2003 - 2009 models.
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