[ninty]

Theres no way that will ever work dude.

How will you control throttle and brake?

How big is the engine anyway? Looks pretty small. If your putting a 150lb guy and trying to get a shitty little engine to push you around, think again.

Your biggest problem is with drive from the engine to the wheels. You'll never get it to work. You need a proper adapter to come out of the engine, then attach a sproket with a chain, to then attach to the the rear wheels. If you expect to weld something to the motor, forget it. It won't hold up, espically with no welding experience. To get a nice weld isn't that easy. Trust me. And what type of metals are you using and what type of welder? There are some welders that cannot weld certain materials. If your neighbour has an arc welder and your not using aluminum, then your screwed.