This kit is discontinued and replaced by part# MU623100. Click here to see our new chain tensioner for Grom® and Monkey® 2014-2021. 

*Does not fit 2022+ models

Made from resistant high quality material, our Koso chain tensioner could save your engine from expensive damage. We came up with this long lasting solution to replace the OEM chain tensioner which has a tendency to wear prematurely.

Specifications

• The arm is made with Aluminum 6061, and the wheel is made with JIS SCM415 (=SAE 4115) Alloy Structure Steel (Chromium Molybdenum Steel).
• Works on stock engine and highly recommended to use with our Big Bore & 4V Head kit.
• fits Grom® (2014 & up) and Monkey®