I replaced the original OEM regulator/rectifier [r/r] on my 2001 5th gen with a Shindengen SH847 series-style r/r from roadstercycle.com. There were no problems evident with my elecrical system, but with 48,595 miles on my old[ish] VFR, I might be on borrowed time with the all-original wiring, stator and r/r. I read through the pinned threads on the vfrd electrical forum: 'stator tests', 'electrical upgrade', and 'tips and tricks' - thanks to everyone who contributed their advice and experiences