I just bought an 015 650tk ...since I have had the bike the red f1 indicator has been flashing 15 short flashes ..I can’t find any reference to 15 short flashes in the error codes in the manual or anywhere online.
The bikes seems to be riding normally ..on last ride I was idling at a traffic light and there was a pop kind of a sound, sounded like a vacuum or air related sound. The bike immediately died as the sound occurred. It started back up normally right away only difference was the red f1 indicator was no longer doing the 15 flashes..this lasted for about 2 minutes of riding before it came back.
Has anyone had this problem or have any idea what this could be?
I tried to reset the error codes first by doing the procedure I read about here then by disconnecting the battery for 20 mins neither worked.

Thanks for any help!