Prox Kolben-Kit Pw50 `81-24 (40.00mm)

ProX 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. ProX Piston Kits are a first class solution to replace the original piston in your Motorcycle, Scooter, Moped, ATV, Personal Watercraft, etc. Coated for ultimate performance Most of the ProX pistons come with a coating. Our OEM style Tin coated pistons assist the wear in process when you just started the bike. We have developed a new skirt coating that not only assists the wear in process, but also helps reducing friction after the wear in. The black coating is made from a delicate mix of materials and will increase performance.   Product specifications Attribute Value Additional Info Cast Piston Bore - Actual 40.00 mm Bore - Oversize STD Bore - Standard 40.00 mm Boss Space In 13.50 mm Compression Height 20.00 mm Country of Origin Japan OEM Reference No 18U-11631-00-A0 Piston Head Type Dome Piston Pin Hole Diameter 10.00 mm Ring Locating Pin (E) 13.00 mm Ring Locating Pin (F) 13.00 mm Skirt Coating - Total Height 50.00 mm