To check the current flow in the charging circuit, use the “DDS” tester, which is equipped with an inductive clamp-type amper­emeter.

Follow the instructions given in the paragraph “Testing the battery charging system” (Sect. D 5).

A negative value means that charging system is not powering the loads and a significant amount of current must be supplied by the battery, which is discharging at the time of the measurement.

Or it is possible to use a multimeter (Sect. P 9, Diagnostic instruments): connect the multimeter probes to the battery terminals, select the DC scale on the instrument and check for the presence of 14.5 V ±0.5 at an engine speed of 3000 rpm.

If polarity is reversed when clamping the ammeter onto the cable, the sign of the readings will also be reversed, giving rise to incorrect diagnosis.

Charge the battery if the open circuit voltage is lower than 12.8 V. Leaving the battery discharged for more than one month could damage it. Check the battery charge with a voltmeter.

Always check the condition of the battery before recharging and 1 to 2 hours afterwards.

Pay careful attention to recharging times. Stop charging immediately if the battery becomes too hot to the touch. Leave to cool before resuming charging.

If the battery voltage is less than or equal to 11.5 V, it must be recharged.

Use a voltage of 16-17 V.

If the ammeter shows no change, increase the voltage to the maximum of 25 V.

Charge for 5 minutes.

If the ammeter shows a change, return the voltage to 16-17 V; otherwise replace the battery.

Before carrying out any operations on the battery, keep in mind the safety standards (Sect. A 3, General safety rules).

If the liquid comes into contact with the skin, wash thoroughly with cold water. If it comes into contact with the eyes, wash thoroughly with water for 15 minutes and consult an ophthalmologist. In the event of accidental ingestion, drink large quan­tities of water or milk, and continue with milk of magnesia, beaten egg or vegetable oil. Do not allow sparks, flames, cigarettes or any other heat source to come near the battery, as it produces explosive gases.

When recharging or using the battery indoors, make sure that the room is adequately ventilated. Do not inhale the gases pro­duced during recharging.

Make certain that air bubbles emerge from all six filler holes. Leave the container in this position for at least twenty minutes. If no bubbles emerge from one of the holes, tap gently on the bottom of the respective container.

Place the sealing cap strip (3) previously removed from the electrolyte container (2) on the battery, taking care not to force it into the filler holes.

For 3-12 Ah batteries, leave to stand for at least 30 min.

For batteries of over 12 Ah, leave to stand for at least 1 hour.

If using an automatic charge reducing battery charger, make certain that the charger current (amps) is greater than or equal to the standard (STD) recharging system indicated on the battery.

Before carrying out any operations on the battery, keep in mind the safety standards (Sect. A 3, General safety rules).
When under charge, batteries produce explosive gases. Keep batteries away from heat sources, sparks or open flames.

Never remove the retainer bar (1) on the top of the cover or add more liquid to the battery. If the casing, the cover or the terminals are broken, or if the sealing cap strip has been tampered with, the battery must be renewed.

Remove the tank covers (Sect. E 2, Removal of the fuel tank fairings).

Remove the fuel tank (Sect. L 2, Removal of the fuel tank).

Remove the caps from the terminals, unscrew the screws (3) and (4) on terminal clamps always starting from the negative one (3).

Tighten the terminal clamp screws to the specified torque (Sect. C 3, Frame torque settings) and apply grease around the battery terminals to prevent oxidation.

Remove the battery, as previously described in the paragraph “Battery“ of this section.

Remove the vertical head coil as described in Sect. M 3, Coil.

Refit all the removed parts in the reverse order to that in which they were removed, paying attention to screw tightening torques (Sect. C 3, Frame torque settings).

It is equipped with a 12 V, 520 W alternator, consisting of a stator (A) located in the generator cover and a rotor (B) fixed to the crankshaft.

To check the battery charging system for faults, use the DDS diagnosis instrument and follow the instructions given in the para­graph, “Testing the battery charging system“ (Sect. D 5).

The absolute value of voltage measured across the terminals of two of the three yellow cables (the measured value will be the same whichever combination of cable is used) must be within the range indicated in the table below.

(Ambient temperature: 20 °C)

If checks have a favourable outcome, reconnect the alternator to the regulator with ignition key on OFF. Make sure that no cables are damaged or disconnected.

Disconnect the cables of the generator-side electric system (refer to the chapter “Routing of wiring on frame”, Sect. P 1).

Remove the generator cover, the stator (A) and the rotor (B) (Sect. N 8, Removal of the generator cover).

Install the rotor (B), the stator (A) and the generator cover (Sect. N 8, Refitting the generator cover).

Fit the sprocket cover (C) tightening the screws (D) to the specified torque (Sect. C 3, Frame torque settings).

Connect the cables of the alternator-side electric system (refer to the table in chapter “Routing of wiring on frame”, Sect. P 1).

The rectifier/regulator consists of an aluminium casing containing the diodes that rectify the current produced by the alternator. It also contains an electronic device that regulates the current supplied by the alternator in accordance with battery voltage.

If the battery is drained, the current has the value necessary to restore optimum operating conditions of the battery.

Check the charging current using the DDS diagnosis instrument following the instructions given in the paragraph “Testing the battery charging system” (Sect. D 5).

Disconnect connector (B) from generator and main wiring harness (A) (Sect. P 1, Routing of wiring on frame).

Tighten the screws (5) to the specified torque (Sect. C 3, Frame torque settings).

Connect the generator connector (B) and main wiring harness (A) (Sect. P 1, Routing of wiring on frame).

In order to correctly route regulator cable, indicated with reference numbers (25) and (26), follow instructions given in Tables E and H under “Routing of wiring on frame”, Sect. P 1.

Refit the right-hand conveyor (2) together with regulator (1) to frame, then tighten the screws (3) and (4) to the specified torque (Sect. C 3, Frame torque settings).

The 30 A fuse (1) located on the airbox protects the electronic regulator.

To gain access to fuse, proceed as follows: remove the seat, so insert the key in the lock and simultaneously apply downward pressure in the area of the catch to release the pin.

Remove the tank covers (Sect. E 2, Removal of the fuel tank fairings).

Remove the fuel tank (Sect. L 2, Removal of the fuel tank).

Switch the ignition key to OFF before replacing a fuse to avoid possible short circuits.

Never use a fuse with a rating other than the specified value. Failure to observe this rule may damage the electric system or even cause fire.