Some I love, others, no so much, I have reservations about the wisdom of under guarded primary belts or chains right by the riders foot or leg, especially if said rider is wearing jeans or joggers rather than leathers. I have worked around these small single pot diesels and seen how quick a loose bit of rope can get pulled into them and just how slow they are to stall / how much damage they can do. Love the massive German sidecar halfway through.