Regulator Problem, Not Sure.
I've been tracking this for a while wondering if I have a stator or regulator problem. Today I took one of those cheap digital meters ($20) you get from Home Depot, put spade lugs on the leads, hooked to battery, and ty-rapped it between the tach and speedo.
Took the bike out and the numbers were good. 13.8-14.0v. After about five minutes of running the numbers suddenly dropped to about 12.5 and began to go lower. The battery drained close to 12v by the time I pulled into the drive.
I had hooked up an O-scope earlier and saw what I thought to be a sizable AC ripple across the battery.
The bike also stalls at idle even with the good voltage so I think there are some other issues. Starts up quick, though.
After reading the Vulcan verses I think this is the regulator.
'01 Vulcan 750