Originally Posted by MotorBicycleRacing
and where exactly would "here" be?
What USA state are you in?
CA says: Automatic transmission and a motor with less than 2 gross brake horsepower.
All that means is that can not shift gears and frankly even the areas that enforce the motorized bicycle laws do not even care about the 2 HP part.
I'd have to look at California law again. Most of the states have the automatic clause in their laws. Some even go as far as to say no shifting by the operator to the engine primary drive system. Or no external shifting device (lever, twist shift etc). The legal loophole is to build a bike which shifts gears automatically. So far I haven't read any laws from any state, which won't allow you to do this.