High-Performance Cam Chain Tensioner | For YZ250F YZ450F WR Models | Manual Timing Adjuster

Take control of your engine's timing with this manual cam chain tensioner for Yamaha 4-stroke engines. Engineered for precise adjustment, it replaces problematic automatic tensioners to deliver consistent valve timing, reduce engine noise, and prevent costly timing-related failures. Features and Benefits - Precision manual adjustment screw - Enables exact chain tension setting for optimal performance and eliminates automatic mechanism failures. - CNC-machined billet aluminum body - Provides exceptional strength, heat dissipation, and a premium fit for YZ and WR models. - Locking mechanism with seal - Secures your setting against vibration and prevents back-out to maintain consistent tension. - Complete kit with necessary hardware - Ensures a straightforward installation process as a direct replacement for the OEM part. Applications - Fixing timing chain rattle and improving engine quietness on high-performance models. - Essential upgrade for competition use where reliable, adjustable tension is critical. - Long-term reliability solution for trail, cross-country, and motocross applications.