Spring Chain Tensioner, Wear Resistant Heavy Duty Chain Idler Tensioner with Pulley Derailing Prevention for 49cc 50cc Gas 2 Stroke Engine Motorized Bike

Powerful Function: Protect the swing arm and help guide the chain correctly to prevent the chain from derailing, sprocket from excessive wearing, and extend the chain life. Professional Production: The superior idler pulley chain tensioner has undergone extensive quality and safety testing to ensure long service life and strong reliability. Wide Application: The chain idler tensioner pulley kit is extensively suitable for 49cc 50cc 60cc 66cc 80cc gas 2 stroke engine motorized bike. Good Replacement: The spring chain idler tensioner is carefully designed according to the original specification for perfect match and easy installation. High Quality Materials: The spring chain tensioner kit is exquisitely processed by premium steel alloy and ABS materials with higher strength for maximum durability.