hello, i am working on a cvk40 carb on a 2009 klr650 with no success so far. bike dies with slight throttle but idles fine. I have cleaned jets and inspected slide membrane and all appear to be fine. the only way I can throttle without bike dying is to cover the carb vent line(on airbox side of carb) with my finger. When doing this I can feather throttle and eventually get to near full throttle. As soon as I remove my finger from vent line it dies again. I am thinking of replacing slide membrane or adjusting float level, but I feel i am missing something simple. Any insight would be greatly appreciated.