COMBO Spring loaded Automatic Chain Tensioner

2 Pc Combo package; 

Includes a ball bearing Idler pulley and also includes a ball bearing 10T sprocket.   Choose the one you like. 

This engine drive cover attach Automatic Chain Tension feature is a great enhancement over the standard clamp to frame stay fixed idler.   

With this spring-loaded tensioner means you might Never have to adjust chain tension again.   

This auto tensioner has a Pulley with ball bearing operation same as the standard kit stationary bike frame chain stay model.  However, If you prefer a 10T ball bearing sprocket it is also included. 

Keeps constant tension on your drive chain to overcome loose or stretched chains that will occur over time. 

Attaches to the drive cover of any Chinese 2 stroke bicycle engine.   

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