No recommendation as to either way, but just an experienced observation. Depends on weather/traffic and escape route/moment in time...whatever. I have used the transmission in neutral in very high temps (the clutch generates heat when pulled in at a stop), but you need to guage what your outs are. If there is no apparent threat then it's 'usually' ok to drop the trans into neutral to keep heat at a minimum. I'm talking +100 amb temps here and stop and go traffic with NO threat of a rear end run up. And it depends on the interval of the stop light. There again you need to scope out the feel of the traffic around you and if there is any hint of cagers being "light nervous" or jumpy, keep the bike in gear and leave yourself an avenue of escape.