I would have to dissagree with the statement that it will only cost you $100 to make a rolling chassis. Here are some of the things you are going to have to buy. Some you can fabricate, but others not.
- Tyres and rims
- Clutch (approx $35 already)
- Steel
- Steering wheel
- Spindles
- Seat
- Pedals
- Brakes
- Brake and throttle linkages and cables
- Sprockets
- Axle
- Maybe some machining work (depending)
- Motor mount
I am sure there are lots of things that I have forgotten, like an assortment of nuts and bolts, washers etc.
My point is that you are NEVER going to be able to fabricate your own rolling chassis for $100 if you buy everything.
Your will be better off looking at Craigslist and buying a beat up kart for that amount and just slapping your ngine on.
Just my 2c....