The Yamaha 93340-21008-00 Thrust Bearing Kit is a genuine Yamaha thrust bearing designed to support axial load and reduce friction within engine and drivetrain assemblies. It is used in crankshaft and transmission assemblies in Yamaha motorcycles and off-road models, including YZ125, YZ250F, and WR250F. The kit features hardened steel bearing surfaces and is designed to control axial movement and maintain shaft alignment under load. OEM status is Genuine Yamaha part, with common replacements including Yamaha 93342-21013-00, 93340-21007-00, and 93340-21009.
