I wonder if anyone can help me. On my powerbike 56, to operate the rear brake
you pedal backwards, and in doing so today the arm of the brake has come off.
For the life of me I cant find how it was fastened on. There is a slot on the
arm which mates up to the male piece on the hub but there is no way of keeping
the arm on the hub. The only way I can think of keeping the arm on the hub would
be to drill and tap the slot then put a bolt in to secure the arm. Any help
would be grateful. Pete.