Just joined this site. I just modded a 2006 Suzuki S40. Muffler elimination with slip on. Rejet with 150 main. 55 pilot. Now I can't get it to start. Will turn over and occasionally fire. Maybe even run for a couple secs. Opening throttle kills it. Battery is good and replaced spark plug. Good spark. Fuel flow good. Fuel in carburetor bowl with in half centimeter of top. Should mention that bike ran before mods. I have a Suzuki dealer up the street but would love to solve this myself.. Currently own 2008 C90T Boulevard, and 1974 Kawasaki F9 (aka Bighorn 350).