Trust me, the M120 is a very wide engine top to bottom, the 380Sl has a very narrow engine bay. My co-worker had to hammer on the frame rails to swap a 5.0 into his 107, originally a 380. Hey, I'm not saying it can't be done, money will do anything. I'm saying that if you strap a 1 liter 145hp, 14k rpm engine onto a moped, it's not gonna be even remotely in the same class as a FZ1, now change moped to 380SL and FZ1 to 600SL and you get my meaning. By the time you re-engineer the moped to be competitive you've spent way more than an FZ1 costs.