The RAM-B-309-1U attaches to your motorcycle's handlebar clutch/brake clamp and features one B size 1" rubber ball. The base fits the control clamps on your motorcycle with 40mm x 6mm stainless steel hardware, provided in the kit. To see if the RAM-B-309-1U base is compatible with your motorcycle, check the hole spacing of the base against your clutch/brake reservoir. The hole centers have a minimum width of 0.94" and a maximum of 1.58".