onejug, where in Florida are you?
I live in Orlando. I have a 2005 S40 and this are the mods I've done to mine thus far:
• Petcock replaced with Raptor (vacuum connection sealed)
• Dyna muffler
• K&N filter (replacing the one in the air box)
• Main 150, Pilot 52.5 (stock), 3 washers on the needle
• 2 turns(out) on the screw
My bike has about 2,300 miles on it and it runs great, no pops, no backfires. it only shakes a little bit when I pass 190mph......lol
Joke aside, I can cruise at 75mph real easy, very responsive.