Introducing the AlveyTech Chain Tensioner with Larger 1-3/4" Roller—a game-changing solution engineered for seamless integration onto Baja Motorsports MB165 and MB200 as well as Hensim MB165 and MB200 mini bikes. Featuring a 2-5/8" arm and a generously sized roller. Designed to enhance torque and acceleration and delivering an exhilarating journey for riders of all levels. Elevate your riding experience with this top-tier chain tensioner. Chain Tensioner: The mini bike chain tensioner is a vital part of a Coleman mini bike's drive system. It works as an adjuster roller guide to prevent the chain from loosening or falling off. Steel Roller: AlveyTech drive chain tensioner comes with 1-3/4 inches larger roller. This mini bike roller chain tensioner ensures your chain remains consistently tensioned, providing reliable operation throughout your rides. Broad Compatibility: The AlveyTech Chain tensioner compatible with the Baja Motorsports MB165 and MB200 and Hensim MB165 and MB200 mini bikes. Super Performance: AlveyTech chain tensioner is degined for superior performance, keeping your chain running smoothly and efficiently during every ride. Standard Diameter: The inside diameter of the mini bike chain tensioner is 5/8". It's ready for quick and easy installation with minimal tools required for this DIY. Features: Drive chain tensioner with larger 1-3/4" roller Metal replacement for the baja, hensim mb165/mb200 Mini Dirt bike, scooter, pit power pocket bikes part, diy install Featuring a generously sized 2-5/8" arm