Prox Kolbensatz Crf250r 14-15 13.5:1 Art (76.78mm)

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 4 Valve Pockets, Forged Piston Bore - Oversize STD Bore - Standard 76.80 mm Boss Space In 16.80 mm Compression Height 11.00 mm Compression Ratio - Actual 13.2:1 Country of Origin Japan Cylinders 1 Displacement 249.3 cc Dome Coating None OEM Reference No 13101-KRN-A80 Piston Head Type Flat with raised top Piston Pin Hole Diameter 16.00 mm Piston Size 76.78 mm Skirt Coating Moly Stroke 53.80 mm Total Height 34.60 mm Treatment None