KOYO crankshaft bearings are meticulously manufactured to precise OEM criteria using the highest quality materials. They ensure a perfect fit for both OEM and aftermarket crankshafts. The KOYO 6305JR2 model offers exceptional durability and performance, making it an ideal choice for maintaining the optimal function of your engine. Suitable for KTM, HQV, and GASGAS vehicles, these bearings are engineered to withstand the rigors of high-performance environments. Designed with precision, KOYO crankshaft main bearings deliver reliable and long-lasting performance, ensuring smooth and efficient engine operation. With a focus on premium craftsmanship, these bearings are essential for those who demand the best in engine component reliability and longevity.