Richard
follow the details in the post on the "other" site befor and after you change the Regulator/Rectifier
Record your battery voltage under the follow conditions
1) Ignition off, unloaded battery.
2) Ignition on, headlights on, not running
3) Bike started, running at idle
For condition 1, should be at least in the high 12.x range if fully charged.
In condition 2, your voltage should not drop much below 12.0 at worst. (It may continue to drop – hopefully slowly! – as your lights will be discharging it. However this should be a slow decline)
If it does drop immediately into the 11’s, your battery is insufficiently charged – if it was just charged from a battery charger however, then it indicates your battery no longer has sufficient capacity to retain charge/supply current to load and should be replaced.
Condition 3 is what we are most interested in with respect to charging capability.
Voltage should be at least in the 13’s at all engine rpm. You may detect it will fall off slightly as you raise engine rpm. This is not atypical performance. A simple mod that can enhance your charging voltage to the battery can be achieved by this modification outlined in this thread. That should give you performance in the 14V+ range.
