BMW F 800 ST Engine problems by year

Riding motorcycle in warm to hot weather. When cornering or downshifting for stop motorcycle surges like not taking fuel then stalls and won't immediately restart. Coasted to side of road when possible, after a minute, bike can restart and sometimes make a few more miles before it happens again. Able to "limp" bike home. Started around 5000 miles- bike to dealer once and wasn't fixed - back at dealer now, they suspect fuel pump, but it is unknown if this will fix problem. I consider this a major safety issue as...

My 2008 f800st motorcycle stalls intermittently during normal operation which has led to multiple instances of close calls (almost crashing). *Tr

I was riding the motorcycle at a steady highway speed. I had been riding the motorcycle at a steady highway speed for 30 miles continuously. Engine cuts-out completely, with no warning. Motorycle rolls to a stop, I switch engine off, wait one minute, cycle start sequence, engine sometimes starts, sometimes doesn't. I avoided highway traffic with some difficulty, as the motorcycle slowed abruptly. I turned on the hazard lights . This has happened 8 times. Motorcycle is at dealership for repair. *Tr