Electrical equipment and instruments of motorcycle Aprilia RS125/3 (1998-2005)

Battery removal
Read 1.2.1 carefully. Torque wrench settings: Screw (2): 3 Nm (0.3 kg·m) Note. When the battery is removed, the digital clock will be reset to zero. See clock setting instructions at paragraph 2.3.1. Lift the fuel tank; see 2.7.1. Disconnect the...

Removing the engine control unit
Torque wrench settings: Screw (2): 3 Nm (0.3 kg·m) Remove the tail section; see 7.1.9. Disconnect the connector (1). Release and remove the two screws (2) and collect the nuts underneath. Remove the Engine Control Unit.

Voltage rectifier removal
Torque wrench settings: Screw (1-2): 10 Nm (1.0 Kgm) Remove the tail section; see 7.1.9. Release the wiring from the clip. Release and remove the screw (1) and collect the washer. Release and remove the screw (2). Note. Refit the two grounding wires...

Removing the right-hand light dip switch
Read 1.2.1 carefully. Torque wrench settings: Screws (2): 3 Nm (0.3 kg·m) Lift the fuel tank; see 2.9.1. Disconnect the two connectors (1) of the right-hand light dip switch. Release and remove the two screws (2) securing the two shells at the...

Removing the left-hand light dip switch
Read 1.2.1 carefully. Torque wrench settings: Screws (2): 3 Nm (0.3 kg·m) Lift the fuel tank; see 2.9.1. Disconnect the connector (1) of the left-hand light dip switch. Release and remove the two screws (2) securing the two shells at the bottom end....

Removing the ignition switch/steering lock
Read 1.2.1 carefully. Torque wrench settings: Screw (5-6): 25 Nm (2.5 kg·m) Remove the top yoke; see 2.16.1. Lift the fuel tank; see 2.9.1. Disconnect the connector (1) of the ignition switch assembly at the main wiring harness. Release and remove...

Removing the instrument panel
Read 1.2.1 carefully. Remove the front fairing; see 7.1.4. Disconnect the speedometer cable (1) and remove it from the left fairing. Undo and remove the three nuts (2) and collect the washers. Release the instrument panel wiring from the ties....

Headlight removal
Read 1.2.1 carefully. Torque wrench settings: Screws (1): 2 Nm (0.2 kg·m) Remove the front fairing; see 7.1.4. Release and remove the three screws (1). Remove the headlight. Note. See 8.15.1. for instructions on how to replace the bulbs.

Removing the front direction indicators
Read 1.2.1 carefully. Disconnect the connector (1). Note. It is not necessary to remove the fairing. Release and remove the screw (2). Remove the direction indicator.

Removing the rear direction indicators
Read 1.2.1 carefully. Remove the number plate bracket but leave it attached to the wiring; see 7.1.13. Disconnect the pair of connectors (1) of the direction indicator you wish to remove. Look at the colour to identify the connectors: Right...

Warning horn removal
Read 1.2.1 carefully. Torque wrench settings: Screw (2): 22 Nm (2.2 kg·m) Remove the air dam; see 7.1.3. Disconnect the two connectors (1). Release and remove the screw (2). Remove the horn.

Removing the tail light
Read 1.2.1 carefully. Remove the number plate bracket but leave it attached to the wiring; see 7.1.13. . Disconnect the three tail light connectors (1). Warning! Make sure to refit the connectors (1) to the matching connectors on assembly. Release...

Layout of electrical components
1. Headlight; 2. Battery; 3. Spark plug; 4. Fuses; 5. Coil; 6. Flasher; 7. Voltage regulator; 8. Tail light; 9. Rear left indicator; 10. Side stand switch; 11. Starter motor; 12. Warning horn; 13. Starter relay; 14. Front left indicator; 15. CDI...

Wiring colour codes and electrical connectors
Please read the following information before reading this section. Note. For ease of reference, the same numbering is used in the specific wiring diagrams and in the general schematics. Wiring colour codes Ar Orange Az Light blue B Blue Bi White G...

Sensors and rev counter circuit
Troubleshooting Check the condition of the 15A fuse. Check wiring connection. Rev counter Fit a substitute rev counter known to operate properly. Coolant temperature Disconnect the green-grey terminal wire and connect three resistors rated 1,000 Ω,...

Visual and acoustic signalling system
1. Left-hand light dip switch; 2. Warning horn; 3. Fuse (15A); 4. Fuse (20A); 5. Key; 6. Battery; 7. Flasher; 8. Rear right indicator bulb; 9. Rear left indicator bulb; 10. Front right indicator bulb; 11. Front left indicator bulb; 12. Indicator...

Brake lights circuit
1. Front brake light switch; 2. Rear brake light switch; 3. Fuse (15 A); 4. Fuse (20 a); 5. Key; 6. Battery; 7. Tail light; 8. Brake lights Troubleshooting Check the condition of the 15A and 20A fuses. Check the condition of the brake light bulb....

Light circuit of motorcycle
Troubleshooting Check the condition of the 15A and 20A fuses. Check the right and left light dip switches for proper operation. Check bulb operation. Light dip switch test Check for continuity across the contacts using a multimeter set to the ohm...

Rave valve circuit
The RAVE control unit operates the solenoid to open the valve at the exhaust end at 8100 rpm. Troubleshooting Check the condition of the 15 A fuse. Attach a 12V battery direct to the solenoid to check for proper operation. Check the flywheel; see...

Stand logic circuit
Engine starting and ignition are inhibited when the stand is down and/or a gear is engaged. Troubleshooting Check the condition of the 15 A fuses. Check the neutral light switch. Check the stand switch. Check the diode. Check the starter relay; see...

Bulb replacement
Read 1.2.1 carefully. Warning! Before proceeding to change a bulb, rotate the ignition switch to "". Wear clean gloves or use a clean, dry cloth to handle bulbs. Do not put your fingerprints on a bulb, as this may cause overheating leading to...

Replacing the fuses
Warning! Never attempt to repair a defective fuse. Never use a fuse of a rating other than specified. This could damage the electrical system or cause a short circuit, with the risk of fire. Note. When the fuses fitted in a particular position keep...

Beam height setting
This is a quick beam-setting inspection procedure. Place the motorcycle ten metres away from a vertical wall. It is important that the motorcycle be on level ground. Switch on the low beam and sit astride the motorcycle. The light spot on the wall...

Wiring diagram of motorcycle
1. Generator; 2. Ignition coil; 3. Starter motor; 4. Voltage regulator; 5. Fuses; 6. Battery; 7. Starter relay; 8. Front brake light switch; 9. Rear brake light switch; 10. Coolant thermistor; 11. Mixer oil reserve sensor; 12. Neutral light switch;...