KOYO 93313-92513-00 Cylindrical Roller Bearing

The KOYO 93313-92513-00 Cylindrical Roller Bearing is a genuine Yamaha/Koyo component designed for engine crankshaft and balancer shaft assemblies, commonly installed in Yamaha XT550 and similar motorcycles where precise support for rotating components under high radial loads is critical. It uses hardened steel rollers and raceways in a cylindrical roller configuration to support crankshaft and piston assemblies, minimize friction, and maintain reliable rotation within the engine's crankcase under demanding off-road conditions. Part number 93313-92513-00 carries Yamaha OEM status and is listed as discontinued or limited supply, making sourcing relevant for restoration projects. Common replacements include Yamaha 93313-31502-00, Yamaha 93313-42501-00, and a KOYO equivalent cylindrical bearing to fit similar Yamaha engine platforms. This bearing's application area covers crankshaft and piston assembly in Yamaha engines, emphasizing high radial-load support and reduced friction to sustain engine performance in off-road and dual-sport use.