Here's one person's experience with a similar condition.
http://www.thumpertalk.com/topic/239796-tw200-cuts-outany-ideas/
I had a similar albeit intermittent issue with a Suzuki 650 CDI that would just shut down on me while cruising along, just unwind like no spark/fuel, then it would come back up for me after a bit if I just held the throttle steady. Might not do it again for a day or two. Fuel flow was great,ended up being the CDI - costly on that bike!