After readjusting my idle mixture screw to improve the cold start caracteristics, My 600 would barely move off idle. Being that I had just played with the carb, I fiqured I had done something wrong with the adjustment. After farting around for a few hours I realized the mistake.

There is a vent tube which comes up from the carb and is clipped to the pvt snorkel, it then curves downward. It is very easy to get this tube into the carburator intake snorkel when replacing the airbox cover. Just some thing to keep an eye on whenever you remove and replace your cover.