Woodruff Key 4x4x12 for KTM 390 Duke/Adventure, Husqvarna 401 - J888040150

This is an OEM Woodruff key (4x4x12mm) used in the crankshaft and piston assembly. It secures components like gears or rotors to the crankshaft, ensuring precise timing and power transfer. Manufactured to exact factory specifications for reliability.

Compatible with KTM 125/250/390 Duke (2013-2026), 390 Adventure (2020-2026), 390 RC (2014-2026), 125/390 Enduro R, 125 SMC R, 250 Adventure (2020-2024), and Husqvarna Svartpilen/Vitpilen 125/250/401 (2018-2026) across various colors, markets (EU, US, GB, RW, etc.), and variants including B.D., nHD, ABS, and CKD models. Fits all listed 125cc, 250cc, and 390cc single-cylinder engines from 2013 onwards.

Precision-engineered for high RPM applications in off-road and street motorcycles. Resists shear forces and maintains alignment under extreme conditions. Direct OEM replacement with part number J888040150.

Installation requires standard crankshaft disassembly tools. Ensure surfaces are clean before fitting to prevent slippage. Torque to manufacturer specs during reassembly.

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