Buell XB9/12 R/S new model belt tensioner Silver. Fit's all Buell XB models.
The stock Buell belt tensioner is designed to keep the belt under constant tension, except it does not. When the suspension is completely unloaded, such as when pulling stoppies or even braking hard, the tension is increased to an alarming degree, which can actually damage belts, wheel bearings and pulley bearings. This spring loaded item is designed to maintain a tension of 10.5kg regardless and will help lengthen belt and bearing life. Extensively tested in competition this is a must have accessory. Use stock tensioner wheel.