Topic: Charging OK according to Clymers, But?

[ckahleer]

81 CB650 stock
I checked battery voltage the other day and it was 12.2v. This seemed too low considering I put in a new fully charged battery in just one month ago.
I put a Battery Tender Junior on it and it took at least 8 hours to fully charge.
I have been doing a lot of tinkering on the bike. a lot of time idling.
At the battery, at 5,000 rpm I'm getting 14.7v. At 2,000 rpm 13.00v. At idle (1000 rpm) I get below 12.6v, so the bike is running, at least partially, off the battery.
Is this normal?

[bryanj]

Yes, you need revs to break even

[PeWe]

A fully charged battery will show correct voltage.
14.7V @  fully charged and 5000rpm?
If not it will increase and you need to adjust the regulator a little to reduce the level a little.
14.7V is max for old type of battery.