How can you create a motor bike?

They actually have some slant head motor kits on ebay, and other websites for alittle over a hundred dollars... I got mine for $115.

But basically what that is, is pretty close to a chainsaw motor, and if you have a chainsaw you could experiment with that. Go see how they make the motor kits, and then try to make your own, which will risk wasting a chainsaw if you mess up, and buying one online will cost money.

Or I'm sure if you took apart a weed-wacker and opened up on the spinal area you could figure out how to put a chain on it & get some mounters to mount it onto your bike.

The only choice left besides buying, experimenting, and building, is to just be green.

If you're a kid, then I know it's hard to get money at the age, or if you're not then I know it's hard even as an adult to get transportation without good money, but if you're just wanting to make one to see how cool it is then keep trying, you'll get there!