This automatic motorcycle chain tensioner is designed as a replacement or accessory to help maintain proper chain tension on compatible motorcycles and bikes.It features an automatic adjustment mechanism to support consistent chain alignment during use.Constructed from aluminum using CNC machining, the unit weighs approximately 540 grams and measures 9 x 9 cm (3.55 x 3.55 inches).The adjustable range extends up to approximately 17 cm (6.7 inches).It is designed for straightforward installation using standard mounting configurations found on applicable vehicles. Includes: 1 x chain adjuster