Motorcycle One Way Starter Clutch Gear Assy Bearing Gear Flywheel For TRX400EX 400 EX 1999-2008 TRX400X 2009-2014 This one way starter clutch gear assembly is designed for use with TRX400EX 400 EX models from 1999 to 2008 and TRX400X models from 2009 to 2014.It includes the bearing, gear, and flywheel components necessary for proper starter clutch.The unit functions as a one-way clutch to engage the starter mechanism during engine start and disengage once the engine is running.It serves as a direct replacement for the component, compatibility with the specified models.Installation requires standard mechanical tools and knowledge of engine systems.