Re: saw chopper bikes on youtube and had to get one :)
I'm in the same boat. I saw the bikes on youtube aswell and had to have one. I'm taking a different approach though. I had an old Huffy frame in my shed and decided to build a trike. My motor is off an old weewacker, it's 31cc. Fitting it to the trike wont be a problem. I don't know if it's going to powerful enough. My son is only 100lbs so as long as it moves him around i'll be happy.