CP Pistons brand Project X series 2004-2008 Honda CRF250R forged piston kit. For use in high performance and racing engines; for use with a +3mm big bore size of 81mm; and stock stroke of 52.2mm; 13.5-1 compression ratio; fully box styled forging, with coated skirts, 268cc kit includes light weight piston; light weight piston pin; piston rings and pin lock rings. Requires a sleeve or cylinder
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