Both problems can be eliminated with the installation of the manual tensioner. No matter what the engine does, the cam chain tension will remain constant. An manual cam chain tensioner is a must for any kind of performance riding. Manual tensioners are CNC machined from billet alloy to exact tolerances for perfect fit. Material:Aluminum and steel Package Included: 1 pc MANUAL CAM CHAIN TENSIONER Instructions is included Fitment: 1991 to 1994 Honda CBR600F2 - HURRICANE 600 / CBR600 F2.