CP Pistons brand Yamaha YFZ450 ATV forged piston and gasket kit. Project X series Full Race model kit; for use with a standard size bore of 95mm; and stock stroke of 62mm 2003-05 or 63.4mm 2006-2014 ; 13.25-1 compression 2003-05 or 13.5-1 2006-2014; kit includes top end gasket kit, light weight piston; light weight piston pin; piston rings and pin lock rings. Fits 2003-2014 models. This full race piston kit is a single ring; high compression; ultra lightweight piston featuring a highly efficient dome design that maximizes squish. Includes lateral gas ports for maximum ring seal and coated skirts provide additional lubrication and minimal friction.
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