Bad fuel caused the same problems for me, mis-firing, throttle not crisp, and excess popping on deceleration. I just drained it out of the tank and replaced it with the regular stuff and problem fixed!

Hope your problem can be sorted out easily.

TBA, Stainless extractors / drag pipes, 65mm over forward controls, Thruxton needles, 904cc, head ported, lowered 1-inch, Console removed, relocated battery box, Australia.