{"product_id":"prox-piston-kit-crf250r-14-15-13-5-1-art-76-77mm","title":"Prox Piston Kit Crf250r 14-15 13.5:1 Art (76.77mm)","description":"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. \nCoated for ultimate performance\nMost 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 76.77 mm   Skirt Coating Moly   Stroke 53.80 mm   Total Height 34.60 mm   Treatment None   ","brand":"PROX","offers":[{"title":"Default Title","offer_id":54186804281690,"sku":"01.1343.A","price":206.97,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1015\/6831\/5738\/files\/pim_74391d75-5bb0-42b5-9271-5f614594702f_1000-1000.jpg?v=1779449619","url":"https:\/\/grafiteoffroad.com\/products\/prox-piston-kit-crf250r-14-15-13-5-1-art-76-77mm","provider":"Grafite Offroad","version":"1.0","type":"link"}