yes you know those 50cc poketbikes the use a silence can use some old fiberglass you can get some from homedepot and get a metal tube and weld a cap on one end and a cone on the other the dril a hole for the fule nipple and weld the stinger any place u want and that should work oh the fiberglass will wear out so when it getts loud just cut the cap off and put some more in oh one thin it will be a pipe in a pipe so in the sinter of the big pipe put a smaler one with holes