850 MKII with single Amal 932 carb. Only been running bike a few weeks, so very little experience with it/any carb bike. Was going OK a few days ago.1-2 kicks warm or cold after tickle and choke if cold. Last couple of days, seems to have trouble idling immediately after kicking...will drop below 750 rpm and dies unless I hold throttle open. Has happened like this the last three fuel stops and even after 30-40 min coffee stops. Once running for 5+ min, it's happy at 1000-1200 idle, stop go traffic...no stalls at all. Bike has EI (Vape Wassell...which apparently is similar to the Boyers). Bike does pop a lot when coming off throttle at speed...normal? What should I be checking for, Too much fuel or too little after start up?