{"product_id":"prox-pst-kit-ktm250sx-f13-15-250exc-f14-23-13-9-1-77-97mm","title":"ProX Piston Kit for KTM250SX-F'13-15\/250EXC-F'14-23 13.9:1 (77.97mm)","description":"\u003cp dir=\"auto\"\u003eRestore more power, quicker throttle response, and a crisp top-end to your motorcycle with the \u003cstrong\u003eProX Piston Kit 13.9:1\u003c\/strong\u003e in stock size (77.97 mm) for the \u003cstrong\u003eKTM 250SX-F 2013-2015\u003c\/strong\u003e and \u003cstrong\u003eKTM 250EXC-F 2014-2023\u003c\/strong\u003e (and often also compatible with equivalent Husqvarna FE 250 models from that era).\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis premium high-compression piston kit from ProX Racing Parts is an excellent upgrade or perfect replacement for a worn-out original piston. ProX pistons are manufactured from premium forged aluminum on state-of-the-art CNC machines, with a special anti-friction coating on the skirt. This reduces friction, improves heat dissipation, lowers wear, and extends service life – even under the harsh conditions of motocross and enduro.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003e13.9:1 compression ratio\u003c\/strong\u003e (slightly higher than stock) delivers noticeable horsepower gains, especially in the mid-range and high-RPM bands, without requiring a full engine overhaul. The flat-top piston with an optimized combustion chamber ensures efficient combustion, better throttle response, and extra snap out of corners – ideal for both competitive riders and enthusiastic recreational riders.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis complete kit includes everything you need for straightforward installation: • ProX forged aluminum piston (77.97 mm) • Premium piston ring set • Steel piston pin (wrist pin) • Two circlips\u003c\/p\u003e","brand":"Prox","offers":[{"title":"Default Title","offer_id":51322017775954,"sku":"01.6333.B","price":169.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/1791\/9826\/files\/01-6333-a-1_2.jpg?v=1779192608","url":"https:\/\/mxprostoreparts.com\/en\/products\/prox-piston-kit-ktm250sx-f13-15-250exc-f14-23-13-9-1-77-97mm-2","provider":"MxProStoreParts","version":"1.0","type":"link"}