Will 4 stroke fit here???

70's Schwinn frame..... 8 1/2 x 11 piece of paper fits here.... Is it big enough for a hs 142??

If I build em they will sell.....On the little island I live on, there are more golf carts on the roads than cars...... I'm going to try to see if I can get more motorized bikes here than cars.....You should see my garage, full of bikes... I fix more bikes than the 2 bike shops in town....

I need to come up with a simple design for bike trailers.....