A design I have thinking about is a motorbike using square tubing (easier to work with). The wheels for this project would be the super-duty Worksman bicycle wheels. These front and rear 26" bicycle wheels have thick, wide alloy rims, humungous 11 gauge stainless steel spokes, and moped drum brakes (far superior to Sturmey-Archer). The engine would be a 6.5 HP Clone engine like the one that can often be bought on Harbor Freight Tools for $129 on sale ( a very, very good engine) and a Comet...

I would like to see Brad & Cat come up with a clone design of the TerraTrike Rover. They are a great recumbent tricycle and have a design that would be very easy to build.

"when you push on the right pedal the front wheel will tend to go left
and when you push on the left pedal the front wheel will tend to go right.
"
With a hand-cycle, both hands turn at the same time at the same point on the circle. There wouldn't be any of the side forces you describe.

Hi, guys I was wondering how much it would cost to build the vigilante bike. Thanks

You got stopped by a state trooper.
He asked you if you had an I.D.
And you said, 'Bout What?'