Wiseco Piston Fits Yamaha - 421 cc

Pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers. Piston Kits are a first class solution to replace the original piston in your Motorcycle, Scooter, Moped, ATV, Personal Watercraft, etc.

Piston for sleeved cylinders are available in standard size and a wide range of oversizes. The availability of oversizes up to 2mm significantly helps to increase the lifespan of a cylinder by offering more re-boring possibilities. Pistons for plated cylinders come in standard size, as well as in A, B, C, D\ oversizes. Take advantage of the additional oversizes to extend the lifespan of plated cylinders. All Piston Kits are supplied complete with Piston Rings, Wrist Pin and Circlips.