KOYO crankshaft main bearings are meticulously crafted to meet precise OEM criteria using the highest quality materials. These bearings ensure perfect compatibility with both OEM and aftermarket crankshafts, guaranteeing optimal performance and durability. Specifically designed for models like the 6204/C3 Derbi Senda, these bearings provide reliability and endurance for your YAMAHA engine. Ideal for those looking to maintain the longevity and efficiency of their engines, KOYO crankshaft main bearings offer excellent resistance to wear and tear, making them a trusted choice for any motorcycle or scooter enthusiast. Upgrade your engine's performance and reliability with KOYO's premium quality crankshaft bearings, designed for seamless integration and superior function.