Amazon.com: GREHUA Arch Idler Pulley Chain Tensioner Adjuster Roller Guide Kit for 48cc 49cc 50cc 60cc 66cc 80cc 2 Stroke 4 Stroke Engine Gas Motor Motorized Bicycle Mountain Bike Heavy Duty Racing
Somebody please help with my motorized bike it's with my sprocket and chain I tried nearly everything I tighten the chain as much as I could but that didn't stop it from
49cc 80cc Engine Pulley Chain Tensioner Roller Idler for Motorized Bike Bicycle. - Walmart.com