ProX pistons are precision-finished using the latest state-of-the-art CNC machining technology. They're made from the same alloy used by leading Japanese engine manufacturers. ProX piston kits are a premium alternative to OEM parts when you need a replacement for your motorcycle, scooter, moped, ATV or jet ski.

Most ProX pistons feature an OEM-style coating that aids the break-in process.
In addition, ProX has developed a special skirt coating that reduces friction throughout the entire service life of the piston. The black coating is specifically designed to boost performance.

The retail package includes the piston, piston rings, piston pin + circlips. The small-end connecting rod bearing is not included. You'll find the compatible bearing here.

Nicasil/coated cylinders cannot be bored. Pistons are available in 0.01 mm increments (sizes A, B, C).
Size A: 71.94 mm
Size B: 71.95 mm
Size C: 71.96 mm
Standard cylinder bore 72 mm.

Piston height 75.60 mm
Piston pin diameter 18 mm
Country of manufacture Japan
OEM# reference 556.30.307.100