Prox Piston Kit Crf150r `12-24 11.7:1 (65.99mm)

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 - Actual 65.99 mm Bore - Oversize STD Bore - Standard 66.00 mm Boss Space In 15.50 mm Compression Height 13.50 mm Compression Ratio - Actual 11.7:1 Country of Origin USA Cylinders 1 Displacement 149 cc OEM Reference No 13101-KSE-A70 Piston Head Type Dome Piston Pin Hole Diameter 14.00 mm Skirt Coating - Stroke 43.70 mm Total Height 27.60 mm