Just a quick intro, I passed my DAS 18 months ago and have just bought a 99 firestorm from my younger brother and loving every minute of riding her so far (confidence is also increasing). Some people say it is too much for a newbie, but hey it only goes as fast as you make it

However, she died yesterday whilst on the way back from an early morning ride.....
The dials died, followed by a flashing odometer and then as I pulled to a halt the bike cut out. We managed to jump start her only for the same thing to happen again 3 times before we got home - is this the dreaded rectifier issue I have read about elsewhere on the forum.... sorry if it is obvious question I don't have much bike experience.
Any advice would be great or maybe it's something else.