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I have experienced this, however it seems that it is only from a blip of the throttle that is too small and quick. You can actually get the bike to die at a stop light if you blip the throttle in the “slack zone” of its movement, basically blipping the throttle with little range seems to kill the bike. Now I just give it a good fat blip on downshifts and have not had any issues (even when riding extremely aggressively).

This problem CAN be related to the clutch position sensor too, take a look in the 390 duke forums and you will find that this issue is prevalent in motorcycles that have a defective clutch position sensor.