No
Usually 12 Volt
1998 1200 yamaha vmax
The voltage rectifier is on the left side of the motorcycle just in front of the rear tire.
A regulator is referring to a regulator rectifier which converts the ac voltage put out by the stator to dc voltage and regulates it to a consistent voltage usually 12-14 volts dc.
A voltage regulator converts a/c volatge from the stator to dc voltage and regulates it down to under 15 volts. When they go bad they can over charge and take out a battery as well as not charge at all.
Typically 14 to 14.5 volts assuming a fully ( or nearly) charged battery.
If both batteries are of the same voltage (12 or 6) yes, you can use the charger. make sure that they are of the same voltage.
Take a voltmeter and hook it up to the battery posts and read what the voltage is. It should be 12 volts or more. Now start the motorcycle and check the voltage, if it goes up, it's charging. If not, check the battery to make sure it is not dry.
Overcharging; most likely the altenator is at fault and supplying too high a voltage.
Check the battery voltage, bike not running. Start the bike (crank the rpm's up a little), voltage should be a couple of volts more than battery voltage. Check both voltage (running and not running) at battery terminals. Charge voltage isn't all though, if it doesn't stop charging when it should it will boil the battery dry. If you are having this symptom, it's for sure the regulator
The battery is charged by a generator that runs through a regulator-rectifier. The generator outputs AC voltage and the rectifier converts the voltage to DC. The generator is normally mounted inside the engine on the flywheel.