Piston Kit Gr. II (Size B) for KTM & Husqvarna 250 2008-2016 - 54830007310 II

This genuine OEM Piston Kit Gr. II (Size B) is a comprehensive top-end rebuild solution designed to restore the power and efficiency of your 250cc two-stroke engine. The kit includes a high-quality piston, piston rings, wrist pin, circlips, a needle bearing, and a complete set of top-end gaskets. Using original equipment parts ensures that all components meet the exact tolerances required for peak performance and long-term reliability.

This kit is compatible with KTM 250 EXC, 250 SX, 250 XC, and 250 XC-W models produced between 2008 and 2016, including Six-Days and Factory editions. It also fits Husqvarna TC 250 and TE 250 models from 2011 to 2016. This wide-ranging compatibility makes it the standard choice for maintaining various KTM and Husqvarna 250cc off-road and motocross motorcycles.

The Gr. II (Size B) designation indicates a specific diameter intended for cylinders that have seen some use and require a slightly larger piston to maintain optimal compression. The piston is manufactured from a durable aluminum alloy that provides excellent heat resistance and structural integrity under high RPMs. The included gaskets are precision-cut to provide a leak-free seal for the cylinder head and base.

Before installation, it is recommended to measure your cylinder bore to ensure that a Size B piston is appropriate for your engine's current wear level. Proper lubrication of the needle bearing and wrist pin during assembly is essential for a successful break-in period. Check compatibility list below to see if this part fits your motorcycle model.