Please refer to indications given under “Checking the charging system” (Sect. D 5).

A negative value means that charging system is not feeding the loads and a significant amount of current is supplied to the battery, currently discharging.

Or it is possible to use a multimeter (Sect. P 9, Testers): connect probes from multimeter to battery terminals, select the direct current position on the multimeter; the reading should be 14.5V±0.5 at 3000 rpm.

If polarity is reversed when clamping amperemeter onto cable, readings polarity will also be reversed. This will lead to wrong diagnosis.

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

Strictly follow the recharging time indications. Immediately stop charging the battery if it becomes too hot. Let it cool down before resuming the charging operations.

Carefully read the relevant safety rules before making any intervention on the battery (Sect. A 3, General safety rules).

If the fluid gets in contact with the skin, immediately wash with running water. If the fluid gets in contact with your eyes, wash with abundant running water for 15 minutes and immediately seek specialised medical advice. If it is accidentally swallowed, drink a lot of water or milk, then magnesia milk, beaten eggs or vegetable oil. Keep the battery away from sparks, flames, cigarettes or any other heat source, because it gives off explosive gases.

Ventilate the room when charging the battery or using the battery indoors. Do not breathe the gas given off while charging the battery.

Ensure that air bubbles come out from all six holes. Let the container in this position for more than twenty minutes. Should no air bubbles show from one of the filler holes, slightly tap on the bottom of the corresponding bottle.

Install the cap bar on filler holes, do not fix it yet. Charge the battery as described under Recharging the battery.

When using an automatic-reduction battery charger, check that the charger current (amperes) is equal or higher than the value of standard charging system (STD) indicated on the battery itself.

Carefully read the relevant safety rules before making any intervention on the battery (Sect. A 3, General safety rules). When under charge, batteries produce explosive gases. Keep batteries away from heat sources or open flames.

Do not remove the sealing bar (1) on the top of the cover or top up fluid. Replace battery if block, cover and terminals are broken or if the valve cover has been disturbed.

Always charge the battery before the first operation and after long storage periods – such as before selling the vehicle.

References (16) and (19) are the same as those of diagrams under “Arrangement of wiring on frame” of this section.

Remove the seat (Sect. E 3, Removing the seat).

Lift the fuel tank (Sect. L 2, Removing the fuel tank).

For correct reassembly, reverse the disassembly procedures. Ensure that terminals are not oxidized, then tighten terminal screws to the specified torque (Sect. C 3, Frame torque settings) and use a waterproof spray.

Remove the battery as described under "Battery" in this section.

Remove the "Regulator fuse" as described in this section.

Remove the electronic control unit as described under paragraph “Electronic control unit” in Sect. M 3.

Remove the “Main and injection relays” as described in Sect. M 3.

Installation is a reversal of the removal procedure. Make sure to tighten the screws to the specified torque (Sect. C 3, Frame torque settings).

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

To check operation of the battery charging system, use the DDS, please refer to "Checking the charging system" (Sect. D 5).

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

(Ambient temperature: 20 °C)

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

Disconnect the generator-side electrical cables (see diagram in "Arrangement of wiring on frame", Sect. P 1).

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

Connect the generator-side electrical cables (see diagram in "Arrangement 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 generator. It also has an electronic device controlling the power supplied by the generator depending on battery voltage.

To check recharging current, use the DDS, please refer to "Checking the charging system" (Sect. D 5).

Remove the seat (Sect. E 3, Removing the seat).

Remove the fuel tank (Sect. L 2, Removing the fuel tank).

Open the clamp and disconnect generator/regulator connector from the wiring harness (see diagram in "Arrangement of wiring on frame" Sect. P 1).

Do not disconnect the battery cables while the engine is running. Disconnecting battery cables when the engine is running will damage the regulator.

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

To correctly position the regulator cable (14), follow the instructions of diagram E in Arrangement of wiring on frame under Sect. P 1.

Install the fuel tank (Sect. L 2, Refitting the plastic fuel tank).

Install the seat (Sect. E 3, Refitting the seat).

The 30A fuse placed at the side of the battery mount protects the electronic regulator. Remove the protective cap (A) to give access to this fuse.

To prevent short circuits, ensure that the ignition key is in the OFF position before changing a fuse.

Use only fuses with the specified amperage. Using fuses with the incorrect amperage may damage the electrical system and cause fires.