The KOYO main crankshaft bearing for YAMAHA is crafted with precision to meet exact OEM specifications. Manufactured from the finest materials, these bearings ensure a perfect fit for both OEM and aftermarket crankshafts. Designed to deliver optimal performance and reliability, the KOYO main crankshaft bearing provides superior durability and efficiency, making it an essential component for maintaining the smooth operation of your Yamaha engine. Whether you're a professional mechanic or a DIY enthusiast, trust KOYO to provide the high-quality parts your engine requires. (6304SH)