It may happen in other instances of heavy braking but the bike only seems to run on one cylinder for around 30secs and I'm certain it's a fuelling problem.
Before I start taking everything in bits I also tend to get backfiring back through the carb, sounds like air rather than a pop/bang from the exhaust and wondering if this might also be part of the bad fuelling?
Could a bad air seal between carb and intake or carb and air box cause these issues? If not would be a sticking float or something in the carb?
Really confused about this one

Thanks in advance
Rob