Material: Forged Steel OEM Number: 4TU-15590-00-00, 5AP-15517-02-00 Displacement (ml): 329/499 Model Name: TTR 125 E TT R125 TTR 125 TTR 125 R 2003-2007 External Testing Certification: ISO9001 The Motorcycle Accessories Bearing Starter Clutch Gear Assy is designed for use with TTR125E TT-R125 TTR125 TTR125R models from 2003 to 2007.Constructed from forged steel, the gear assembly offers increased resistance to wear and is suitable for demanding riding conditions.It features a reinforced roller mechanism and hardened, ground components to support over time. The design allows for efficient clutch engagement and contributes to smoother performance across various riding environments, including off-road and urban use.With a temperature tolerance up to 105℃ volatiles≤, the component maintains integrity under elevated operating conditions.This clutch gear assembly is built to match specifications for direct replacement without modifications. This component is produced by an independent manufacturer.Brand names are used for compatibility illustration.