I have a custom-built "ped" with older honda monkey style looks.I put an old 15hp 125ccm 2-stroke air cooled 4speed engine on it, saw`d off the big ribs on the cylinder and put a customized pipe on.It sounds like a moped and it sounds like one but it moves like a motorcycle! The engine aint looking bigger than an average moped`s one.It can achieve about 100km/h.It could do more but the rpm is going too high.And havn`t got any trouble with the law:).Those bigger engines are somehow so much more reliable.With mopeds u have to change the piston rings every two months etc...
Anyone has got done somethin`similar too??