| Well if yours has done it since new and the bike is still going strong then its probably not the reg/rec giving up...and probably is a loose connection somewhere.
however, for peace of mind, remove the right hand fairing, and get down low and take a peek behind the battery tray..there will be a connecting block with 4 or 5 wires going into it. The main one of concern is the connection for the 2 yellow wires. Split the connecting block and take a look at the condition of the block and the connecting spade ends within it. They should appear clean, dry and in good nick...not black, wet or melted! | 
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