Prox Kolbenkit Xr650l Bj. 93-23/slr650 Bj. 97-00/fmx650 Bj. 05-07 (100.50mm)

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 Additional Info Forged Piston Bore - Actual 100.50 mm Bore - Oversize 0.50 mm Bore - Standard 100.00 mm Boss Space In 32.90 mm Compression Height 17.10 mm Compression Ratio - Actual 8.3:1 Country of Origin USA OEM Reference No 13101-MAN-690 Piston Head Type Flat Piston Pin Hole Diameter 24.00 mm Skirt Coating - Total Height 56.00 mm