I have what I think is a Thomaselli throttle cover on my 71 Ambo. It is loose and appears to tighten with a set screw but when I tighten it, it does not help. There is also a nut on it that the screw goes through.....can anyone tell me how to tighten it....do I need to tighten the screw first and then the nut? The cover moves with the cables until they hit the brake lever. Thank you for all advice.
John