Key features

• •1: Material: Steel Spring Chain Tensioner Kit for 2 stroke kit 48cc/66cc/80cc; Engine kit is not included! This listing is only for the chain tensioner.
• •2: Some frames (for example, some mountain bikes with three piece pedal cranks) don't have much room between the pedals and engine. Make sure you have at least 5/16" (8mm) of clearance. 3/8" (9.5mm) or more would be ideal.
• •3: You have to cut off a little engine sprocket cover to make it compatible with the new spring chain tensioner.Forget this point if your bike doesn't get the engine sprocket cover;
• •4: Simple, clean design, and very effective. Improve your bike's reliability!
• •5: Tools Required when you install it; This product Comes with 12months Warranty. Any questions,please contact us firstly! we can help you solve the problem until you are satisfied.