should be pretty easy, just follow the original design exactly, and use the baffle system out of your current muffler...stainless is good, just use thin sheet metal like 22 ga. or maybe little bigger idk, use some common sense and follow the original as close as possible and you should have a sweet pipe....
p.s. dont use a pipe bender, use a mandrel tubing bender or you will kink the crap out of your stainless tubing and it will look and work crappy...
1985 Honda ATC250R drag trike with s/t kit and full drag CR hybrid motor and drag chassis...
1986 Honda ATC250R daily rider fully modded engine, +4 swinger,etc...
1997 Polaris Storm 800 triple, boyesen reeds, dg individual silencers, 240 studs, 123mph on radar...