Piston Kit Gr. I (Size A) for KTM 450 SX-F/EXC 2021-2023 - 00050000271

This is an OEM Piston Kit Gr. I (Size A) for 450cc engines, including the piston, circlips, needle bearing, wrist pin, and complete top-end gasket set. It provides reliable compression and sealing for high-performance off-road riding. Direct replacement for worn components during engine rebuilds.

Fits 2023 Husqvarna FE 450 (US), FE 450 Heritage (US); GasGas EX 450F (US), EX 450F BT (US), MC 450F (EU), MC 450F BT (EU). Compatible with 2022 KTM 450 SMR (EU), 450 SX-F (EU/US), 450 XC-F (US); Husqvarna FC 450 (EU/US), FS 450 (EU), FX 450; GasGas EX 450F (US), MC 450F (EU), MC 450F Troy Lee Designs (EU). Also fits 2021 KTM 450 SMR (EU), 450 SX-F (EU/US), 450 XC-F (US); Husqvarna FC 450 (EU/US), FS 450 (EU), FX 450 (US); GasGas EX 450F (US), MC 450F (EU).

Kit features forged piston for strength, chromoly wrist pin, and high-quality gaskets including base, head, and exhaust seals. Ensures optimal ring seating and heat resistance for motocross and enduro use.

Installation requires engine top-end disassembly; measure cylinder bore to confirm Gr. I sizing. Use proper tools for circlip and bearing placement to avoid damage.

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