CP Pistons brand Yamaha 2006 - 20130 YZF R6 forged piston and gasket set. For use in high performance and racing engines; for use with a 69mm +2mm oversize big bore; and stock stroke of 42.5mm; 635cc engine; 14.5:1 compression ratio; set includes 4 pistons; wrist pins; piston rings; pin lock rings and gaskets. 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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