I'm having the same trouble with my bike, 2005 RR, Mine is strictly for the track but the same problems.
Trailer the bike to the track, bike starts no problem, let the bike warm up, shut it off, no problem....
Session starts, bike starts up again, no problem, hit the track for 20min, come back to the pits, turn the bike off and it is dead next time i start it.
Now, if i let the bike idle for less than 5min once I get back to the pit, it'll start up for the next session no problem,
Now, I've had bikes not charge at a low RPM, but never not charge at a High RPM,
Any ideas anyone? or, does anyone have a recommendation on some kind of data logger so I can see what it is doing out on the track.
have you checked any voltages?
and for reference i had a similar problem with my street bike, if i rode it for any length of time, often it would just not start, was like the battery was totally dead
i *think* i have fixed that, by disassembling the starter motor, i found the brushes to be in spec, but there was a LOT of carbon in there, got rid of all of that, and the bike hasnt failed, or acted wrong yet ... and it only did this when the starter was hot
i was able to readily replicate the issue by idling the bike for extended periods ... get a lot of heat into the starter, kill the bike, and it would fail to restart ... spraying water onto the back of the clutch cover (where the starter is) cooling the starter, allowed me to restart the bike with no issue.