1976 Honda CB550K
Looking for some re-assurance on electrical stuff. No known history of bike, just rebuilt top end and almost ready to start.
Tried new battery but think it is bad from the get go.
Cleaned some electrical connections and took apart the ignition switch and cleaned. Searched older threads and see where Twotired and Scottly mentioned taking voltage measurements to the regulator. I did that but I really don't understand what it means. I did send private messages to both.
Does anyone know what it means?
Measurements:
voltage drop with key on:
1 lead on + battery, the other on regulator black terminal = 1.1v
1 lead on - battery, the other on regulator green terminal = -.15v
Ignition switch after cleaning, turned off; Red wire is about .6 volts less than measurement taken at battery.
Switch on; Red wire about .6 volts less than at battery (with headlight on voltage reading is 10.75v)
Black wire reads the same, which is good.
After charging battery for 8 hours yesterday, it read 12.74v, overnight dropped to 12.64. Installed in bike and turned ignition switch on (headlamp, front turn signals, and rear parking lights on); voltage dropped to 11.7v at battery. Hit the start push button, voltage dropped to 6.5v.
Sound like a bad battery?
