Rebuild your 2-stroke bottom end with the WISECO Main Bearing Kit, engineered for smooth operation and durability at high RPM. Precision grinding and case hardening help deliver long-lasting, reliable performance.
The WISECO Main Bearing Kit is built to restore dependable, smooth crankshaft support in 2-stroke engines. With precision-ground bearing surfaces and manufacturing focused on tight tolerances, it helps reduce friction and maintain stability when the engine is pushed hard. Case-hardened construction is designed to extend service life, making this kit a smart choice for riders rebuilding a worn bottom end or refreshing an engine for consistent performance.
Whether you’re addressing noise, roughness, or wear during an overhaul, replacing main bearings is a key step to protect your crank and keep operation smooth at high RPM.
