Hey, I have a 1980 Honda Express ped. I want to put a bi-turbo exhaust on it, but i know it wont fit properly. I need some advice on what the best way of installing it would be. I was told to cut off the main tube of my old muffler, and weld it to the end of the bi-turbo, but i didnt know if it would work right. Can someone please help?? My moped pic is posted above.