Thats going to be a blast. I have a 49cc PB motor (now 71cc) that's rated at about 5 HP, I think it will be way to much. Will see what I can scrounge up.
Size wise there pretty close. I think Ill get it done up and ride it as a pit bike when we are at the races. Im 240 lbs right now it will look a bit funny. LOL