KOYO Crankshaft Main Bearings are meticulously manufactured by PROX, adhering to precise OEM standards. These bearings are crafted from the highest quality materials, ensuring durability and compatibility with both OEM and aftermarket crankshafts. Designed to provide optimal performance, the KOYO crankshaft main bearings are ideal for those looking to maintain or upgrade their motorcycle engine's reliability and efficiency. The specific bearing model is 6206/C3, known for its robustness and ability to withstand high-stress conditions. Whether you're a professional mechanic or an enthusiastic DIYer, these bearings offer a perfect fit and outstanding performance for your SHERCO, TM, or YAMAHA motorcycles.