As far as I know, Yamaha did nothing to address this "crimp" issue - which is only one small part of a larger deficiency - a so-so charging system.
I did the crimp fix shortly after purchasing my bike in 03. I do remember that it did make a measurable difference in charging voltage, maybe .5 volt at most.
What many folks have done to improve their charging voltage, which is probably just as easy to do as the crimp fix, is to unplug the oem RR connectors (behind the left hand side cover), and run new wires for both the ground and positive. The black ground wire goes to a good engine location (I used a bolt on top of the middle gear cover), while the red positive wire goes directly to the positive battery terminal. A 30 amp in-line fuse is spliced into this new wire. This modification bypasses the crimp location entirely, as well as two connectors and the main fuse, so that more "juice" reaches the battery for charging.
However, if you are having no problems with your bike (read Rawarrior's excellent stickie re charging issues, and check your own voltages ), I would suggest just taking all your bike's electrical connectors apart and coating them with di-electric grease, in particular the three-wire stator connector, which is noted for shorting out and corroding.
Cheers!
