Motorcycle One Way Starter Clutch Gear Assy Kit for TRX400EX TRX400 EX 400 1999-2008 TRX400X TRX400 X 400 2009 This starter clutch gear assembly is designed as a direct replacement for models TRX400EX (1999–2008) and TRX400X (2009).It features a 4-cylinder configuration with a displacement range of 329 ml to 499 ml.Constructed from forged steel, the kit includes one complete set of starter clutch components.The design incorporates stronger rollers and hardened, -ground parts to enhance under riding conditions.Engineered for integration, the assembly supports starting function and consistent.The unit is built to meet ISO9001 standards for quality and consistency in manufacturing.This is not an part.All brand mentions are used strictly for compatibility reference.