I remember having one in the early 70's. It was a bugger to get the motor out from underneath. After a engine rebuild, did the brakes, was looking for some brake fluid at the father inllaws shed, found some, bleed its brakes. Took it for a run, at a red light, the brake pedal went to the floor, hairy ride, think i had it on 2 wheels as we carrened into a service station and slowed enough to use the hand brake. Later found the resourceful FIL had used the brake fluid container to store some machine oil (buggered the brake seals completely).