Piston Kit Gr. II (Size B) fits KTM/Husqvarna/GasGas 250 2003-2026 - 55430007000 II

This genuine OEM Piston Kit Gr. II (Size B) is engineered to restore peak performance and compression to your 250cc 2-stroke engine. As an original equipment manufacturer part, it ensures precise tolerances and superior heat dissipation compared to aftermarket alternatives.

This piston fits an extensive range of models including the KTM 250 SX, EXC, XC, and XC-W (2003-2026); Husqvarna TC 250, TE 250, and TE 250i (2014-2026); and GasGas MC 250, EC 250, and EX 250 (2021-2025). It is also compatible with older KTM 250/300 EXC and SXS models dating back to 2003.

The kit includes the piston, high-quality piston rings, the wrist pin, and circlips for a complete top-end refresh. The Gr. II (Size B) designation is specifically designed for cylinders that have seen some wear, providing a slightly larger diameter to maintain optimal clearance.

Regular piston replacement is vital for 2-stroke maintenance to prevent skirt failure and cylinder damage. We recommend checking your cylinder bore measurement before installation to ensure the Size B piston is the correct fit for your current engine state.

Check compatibility list below to see if this part fits your motorcycle model.