I'm bumping this thread, because my 950 has been having more and more carb problems- it's always popped on decel, and I've only been able to tune that out by making it way over rich, which I am not inclined to do. Recently it's been doing more and more popping and backfiring through the carb at very small throttle openings and when I close the throttle at 2-3k rpm. Makes it very hard to ride around town. It also occasionally dies at stop signs. Bike runs amazingly well under hard acceleration over 4k rpm. This bike has 65k miles on it. I've taken the carbs apart as much as I can short of splitting them (didn't see any reason). soaked them in pine sol and cleaned them really well. I've checked and rechecked float height (3.5mm), pilot jets (cleaned many times, and it acts the same with 42 or 45 jets), needle positions, air jets (all stock), linkage play (there is some, but it seems like the butterfly return springs should take that up). Sync'ed the carbs, checked the TPS. Been all up and down different jettings, it doesn't seem to make any difference. Oh, I've also swapped carbs with a friend (made it run much much better), and then matched his settings (did not help on my carbs). So, I'm open to any ideas. I'm starting to think it's either worn out/stiff diaphragms/slides (I may swap these with my friend to test), or air leakage into the carbs through various places.