CP Pistons brand Yamaha 2006 - 2013 YZF R6 forged piston. For use in high performance and racing engines; for use with a 67mm +2mm oversize big bore; and stock stroke of 42.5mm; 635cc engine;14.5:1 compression ratio; kit includes light weight piston; light weight piston pin; piston rings and pin lock rings. These pistons use the Kramm-Lox system which requires a special tool for installation and removal. If you do not already have this tool you will need to purchase part number cpkl050.
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