WISECO Main Bearing Kit is designed to bring back smoothness and reliability to your 2-stroke engine during a rebuild. Worn or damaged main bearings can cause vibration, noise and premature crank wear—this kit helps restore consistent, stable crankshaft support for confident riding and racing.
With precision-ground bearing surfaces and a case-hardened construction, the bearings are made to handle demanding use and maintain smooth operation at high RPM. Supplied as a complete set, it’s an efficient choice when refreshing the bottom end and aiming for long-lasting performance.
Key features:
✅ Precision ground bearings for smooth, accurate operation
✅ Manufactured to high quality standards for dependable engine rebuilding
✅ Case hardened for maximum life and stable performance at high RPM
Benefits of use:
🔹 Helps restore smooth crankshaft rotation and reduce unwanted vibration
🔹 Supports reliable high-RPM running—ideal for demanding off-road use
🔹 Convenient full kit supply (pair) for straightforward rebuild planning
Technical specifications (if needed):
📌 Brand: WISECO
📌 Vendor part number: WBK5011
📌 Engine type: 2-Stroke
📌 Units: Pair
📌 Size: 28 × 18 × 68 mm
Why choose this product/service?!
⭐ Built with durable, case-hardened materials for long-term use
⭐ Precision manufacturing helps ensure a proper fit and smooth operation
⭐ Great upgrade/replacement choice when doing a bottom-end engine rebuild
