ProX Pst Kit for KTM 250SX-F '16-'22 / FC250 '16-'22 14.4:1 (77.97mm)

Discover the ultimate performance upgrade for your modern 250 4-stroke engine with the ProX High Compression Piston Kit size 77.97 mm (Dimension B) with an impressive 14.4:1 compression ratio. This complete piston kit is specially developed for the KTM 250 SX-F model years 2016 to 2022 and the Husqvarna FC 250 from the same period (also compatible with GasGas MC/EX 250F 2021-2023). ProX delivers a high-quality, Japanese forged piston that delivers more power, better throttle response, and a more aggressive power band – ideal for motocross riders, enduro enthusiasts, and racers who want to get the most out of their 250F without expensive internal engine modifications. This high-compression variant is a popular choice for riders seeking noticeable power gains on the MX track or in technical enduro sections.