Maybe this is beating a dead horse, but here's one more "electrical problem" thread. My '97 VFR (7700 miles on it) has been having some charging system issues. After being stranded by it twice, I decided to take action. I just installed a Lascar volt meter on it (on a custom bracket by the front brake resevoir, it looks pretty trick!). I also have a R/R from a 2000 R1 that I'm planning to install, and I'm planning to pick up a new Yuasa battery. Anyway, here's the data I've gathered with my new volt meter: After sitting for a week, with no battery tending, the battery is reading exactly 12.0 volts with the bike off. When I hit the starter, it dips to about 9 volts, than goes back up to 11.6 volts. This value doesn't go up as the revs increase, even when I rev it up to 8K RPM. It actually dips a little, bouncing between 11.6 and 11.5 as I rev it. Which explains why it left me stranded after about an hour of riding... Additional observations: -Checked for scorched/crispy wiring & harness contacts at the R/R (none) -Checked for loose ground connections (none either) So does this sound like a toasted R/R? I'm hoping it's not a stator issue... I can't believe it on a bike with 7700 miles. And what should my voltage reading be? 13.5 at idle and 14 or so at speed, right? Thanks, Rob
Yes, it definately sounds like an r/r issue. However, your readings may not be entirely correct if you did not start with a fully charged battery. Charge you battery to where it shows about 12.8 volts, key off/engine off. Then start the bike. At idle, voltage should probably be about 13.5 volts. As you rev the engine to 5000 rpm, the voltage should increase to 14.6 - 16 volts (according to my service manual). To check the stator, disconnect the stator from the harness, where the 3 yellow wires terminate at a connector, mine is behind the rigth side mid cowl (yours may be in a different location). Set your digital voltmeter to volts AC. + lead to any yellow wire, - lead to a ground, rev engine, voltage should increase to about 70 volts. If the voltage drops off at any point, the stator is probably bad. I just went through all of this as has another meber here where I posted basically the same answer. Check out this thread: http://vfrworld.com/forums/mechanics-garage/7669-1993-vfr750-electrical-problems.html
