This CP Piston M piston kit is for use on your Yamaha YFZ450R / YFZ450. CP Pistons take advantage of X-forgings to minimize friction and weight without compromising strength. The piston kits double pin oilers add twice the amount of oil from the cylinder wall to the wrist pin. Quench is maximized by radiused domes, while at the same time eliminating possible hot spots that promote detonation. These kits have a V-shaped groove, also known as the accumulator groove, machined into the second ring to collect excess blowby between the top and second rings.
2004-2025 Yamaha YFZ450 13.5:1 95mm std bore platinum series 1mm smaller pin/ 3.5mm long rod piston kit
Bore: 95mm
Comp Ratio: 13.25:1 439cc; 13.5:1 449cc
Piston #: MX1P26
CPK #: YFZ450 CPKX1P26; YFZ450R CPKX1P26R
Rod #: 04-05 6130; 06-07 6129 09-18 8802
Pin #: S748-2000-15C
Locks #: 748x050 SWL
Rings #: CPN2-2-3740
Gasket Only #: YFZ450 C3066; YFZ450R C7908
Year Make Model:
YAMAHA YFZ450R 2004 - 2025
