Re: Quieter ride
An aluminum can extension on the muffler helps. The can will fit right on most of the newer pipes and hold it on with some radiator hose worm clamps. Holes on the end drill easily in the can- a 12 oz soda can or the longer 16 oz beer cans work well.
Some people have talked about putting rubber between the cooling fins- haven't tried that yet.
Met a guy yesterday with a 48 cc and old style muffler with a little longer pipe into a smaller resonator- it seemed quieter than my 66. I think longer pipes off the engine might help. I've got an extension muffler from boygofast on ebay that I havent yet fitted- I'd have to lose my regular kickstand when I do.