99 gsx rfi shuts down without warning

[RDele]

99 gsx rfi

My ski keeps shutting down while riding on the water. Riding along and it just shuts down. The clock still maintains its time. It will start back up and maybe run for a little bit but will shut down again.
I have replaced the post, tried three different keys, new battery, new start button, inspected the battery cables, checked the grounds. No warnings appear on the info center.
It also shut down while I was flushing it after the ride.
What's happening?
The rectifier was replaced last season. The plugs were just replaced before this ride. BR8ES.
Compression test on both cylinders 155-158 in both cylinders.

Voltmeter connected to battery before test 12.95v
Voltmeter connected to battery at idle 13.55v
Voltmeter connected to battery @3340rpm 13.60v
Voltmeter connected to battery engine off at rest after the test 13.19v

I have checked connections at starter (new starter two seasons ago) --good
I have checked ground connections-- good

Any more suggestions?
Thanks for your help.

I'm open to all that are willing to help. Thanks

 

[brock1]

Possibly low oil especially if it only does it when you are riding. The computer will shut the engine down if it reads low oil. The oil dosent actually have to be low for this to happen sometimes the float gets bounced and cant get a accurate reading top it off and see if it makes a difference

 

[RDele]

I just topped the oil off before that ride. ??????

 

[brock1]

I just topped the oil off before that ride. ??????

Well then the next obvious thing would be an overheating issue does it start right back up or does it take a wehile next time it happends take the seat off and see if the pipe is HOT to the touch

 

[RDele]

Well then the next obvious thing would be an overheating issue does it start right back up or does it take a wehile next time it happends take the seat off and see if the pipe is HOT to the touch

Starts right back up. I didn't check the pipe for heat. Wouldn't information center show an overheating warning?

Thanks for your continued responses. Much appreciated.