If you own a Honda CRF250R 2018-2022 our manual cam chain tensioner will help reduce friction and drag, giving your engine more horsepower, freer feeling quicker revving response. The 2018-2022 stock cam chain tensioner puts excessive tension on the cam chain guide creating a lot of drag and heat that will reduce horsepower and response. Having our manual cam chain tensioner will allow you to set the tension to our recommended tension to give you optimal performance.