Yes, stalling when you crack the throttle open to move away from a stop is a well documented problem with the CGT. Some bikes worse than others. I could just about make mine stall on demand, it was so bad. Hasn't done it once since the PCV is fitted. Other changes that seemed to help along the way were idle speed adjust, throttle plate tweak (set back now the PCV in on board) NGK plug and lots of foul language.