Would making an electric motorcycle for senior project a good idea?

Yes that would be AMAZING, you might even get scopped up by a major company and made rich if you succeed. Either that or they will wack you. I would go for it, get together a team of people to help you out. If I were you I would write an email to the local papers and news stations and let them know what you are doing, perhaps spreading the word would help you find some local businesses to fund your project. Best of luck!