Piston Kit TBI 300 Gr. II (Size B) for KTM Husqvarna GasGas 2023-2026 - A45030007110 II

This genuine OEM Piston Kit TBI 300 Gr. II (Size B) is a complete top-end rebuild solution designed for high-performance 300cc two-stroke engines. It includes the piston, rings, wrist pin, circlips, and a comprehensive gasket set to ensure a perfect seal and optimal compression. As an original equipment manufacturer part, it guarantees precise tolerances and the same reliability as the factory-installed components.

This kit is compatible with a wide range of 300cc models from 2023 to 2026. It fits KTM 300 EXC, SX, XC, and XC-W models, including Champion Edition, Hardenduro, and Six Days versions. It is also designed for Husqvarna TE 300, TX 300, and TC 300 (including Pro and Heritage editions), as well as GasGas EC 300, EX 300, and MC 300 models.

The Group II (Size B) designation indicates a slightly larger diameter than Group I, making it ideal for cylinders that have seen some wear or require a tighter fit to maintain peak power. The piston features a specialized coating to reduce friction and heat, extending the life of your engine's top end. Using OEM gaskets ensures that the cooling and lubrication passages remain perfectly aligned.

For best results, we recommend measuring your cylinder bore before installation to confirm that a Group II piston is the correct size for your engine. Always follow the manufacturer's torque specifications for the cylinder head and base bolts. Proper break-in procedures are essential to ensure the rings seat correctly and provide long-lasting performance.

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