I now have an R1 R/R on my VFR! I bought one off eBay for $40 shipped; took a little while to come in, because the seller mixed up my R/R with another buyer's stator hub, so we had to swap packages.
Installed it Sunday and took it for a good hour-long test yesterday. I don't have an onboard voltmeter, so I connected my multimeter to the battery and stashed it in the map pocket of my tankbag so I could read it while riding ... I really ought to install a voltmeter ... 14.4V solid the whole way! And when I got home I put my Battery Tender on it as a test, since that was what keyed me into there being a problem (after recently installing a new battery, twice following an hour-long ride it took a few hours to get back to full charge), and now it was back to full charge in about 2 minutes. :-)
Pretty easy install. Hacksawing the fins wasn't too bad, and I went slow with my wiring to make sure I had good connections. Crimped and heatshrinked the connectors and used butt-connectors with heat-shrink for the 2-into-1 wires (12ga in, 2x14ga out).
R/R barely warm to the touch after an hour, and the wires showed no heat at all (was initially a little concerned about the 2x14ga instead of 2x12ga, but the 2 12ga wires just WOULD NOT go into the butt connector. But, 2x14ga has more cross-sectional area than than 1x12ga, so should be good.)
Now time to plan a trip! New rear tire, new chain and sprockets, new battery, and an R/R that I can count on!
Payne