I hate to be a downer, but like wise I don't think the chassis is going to hold up. At the very least you're going to need some more metal on it to reinforce high stress spots like where the engine mounts.

Regardless, good luck with the rest of your project! [sm=thumbs_up.gif]
If you need any sort of help on it at all, just let me know.

BTW: I might be able to part out a little gas powered scooter we have, if you're looking for a new engine. It's 26cc, and would come with a clutch, chain, and sprockets.