It connects the alternator rotor to the battery until a pre-set voltage is reached, then it switches the voltage off. Voltage is controlled by the battery to prevent the alternator from exceeding the rated voltage of bulbs. Alternators that have permanent magnets don't have a voltage regulator.
Honda motorcycle voltage regulators mostly heat quickly, brand fast, all kind of sizes where available with this brand. you shoud select the particular size of voltage regulators which is suitable to your motorcycle. if you have any issues with that, you can call them for free services through customer care. if you have insurance-make use of it
The voltage regulator/rectifier does the charging of the battery. If the regulator/rectifier is bad it will be letting the battery overcharge. If it is undercharging, first test the battery (most local shops will do this free) if the battery is bad replace it, if it is good replace the volatage regulator.
Voltage regulators convert the AC current that your bike's charging system produces to DC voltage that then charges the battery. Almost all current motorcycle use a 3-phase charging system which you can easily identify if you have three similar wires going into the regulator. The other two wires going into the regulator are the ground positive wire.
The voltage regulator is the connection between the alternator and the battery. The alternator charges the battery to a specified voltage and then the regulator closes the connection.