Jack Brabham started car racing with a Cooper Vincent, in PEI book there is Cooper Mk1v supercharged vincent that he did work on owned by Lex Davison, and The fIying Bedstead owned by Reg Hunt with the ex Les Warton engine 1C/1803
What immediately struck me was how did he accomplish front wheel drive? If you think about it when viewed from the right hand side of the bike the rear wheel rotates clock wise to drive the bike forward. We are looking at the right hand side of the engine as evidenced by the push rod tubes and timing chest cover. So either the engine has been re-engineered to run in reverse or an some other method of reversing the drive chain run was created.At 1:24, there's a very unusual Vincent engined special - double wishbones, fwd, supercharged Rapide engine turned backwards: