What brand is that? I too have a moped, a Puch Maxi made by Sears. A good "exhaust" mod is to drill the holes in the baffle bigger, gives it more top-end. He can also check out
www.mopedwarehouse.com they have alot of stuff, like bore kits, exhaust kits, etc. They are alot of fun, I've had mine for 5 years now made in 1978, and still runs strong.
