Prox Kolbenkit Gb500 Bj. 87-97/xbr500 Bj. 85-89/nx500 9.5:1 (92.50mm

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 Bore - Actual 92.50 mm Bore - Standard 92.00 mm Boss Space In 25.60 mm Compression Height 20.90 mm Country of Origin USA OEM Reference No 13101-MK4-604 Piston Head Type Flat Piston Pin Hole Diameter 24.00 mm Skirt Coating - Total Height 57.20 mm