An update on hot stalls: I found the problem on my bike was caused by the following three factors working together: 1/. Map too lean at low throttle. 2/. Map too rich at medium to high throttle. 3/. O2 sensor was enabled. With O2 enabled it appears the ECU adaption changes the fuel globally. So after riding for a while in a section of the map that is too rich the adaption reduces the fuel to achieve Lambda feedback of 1.00. Then after slowing to a section lower on the map where it was already lean, there is now insufficient fuel to run. I disabled the O2 sensor, increased the fuel down low, decreased it higher-up and returned the idle trim to 1.00. Stalls are now very rare. For safety reasons I cannot recommend it, but confess I have been using a Windows tablet stuck on the tank to monitor throttle, revs and O2 feedback. A dyno tune is on the agenda to address the parts of the map I cannot monitor on the road.