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Sensors and rev counter circuit (Aprilia RS125/3)

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  • RS-series
  • RS 125 [3]
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  • Sensors and rev counter circui…
0


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, 50 Ω and 15 Ω, respectively as shown.

When the ignition key is turned to ON, the following temperature readings or messages will appear on the display.

Resistor ratingDisplay indication
1,000 ΩCOLD
50 Ω90-95°C
15 Ω120-130°C

If display indications are correct, change the thermistor. Otherwise change the display.



1) Resistor; 2) Thermistor


Oil level sensor test



Disconnect all leads at the wiring harness end and remove the sensor from the frame.

Attach a multimeter set to the ohm range to the sensor.

Hold sensor vertically. Correct reading: 0 Ω.

Turn sensor over. Correct reading: infinite resistance.
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Aprilia RS125 3: Equipment and devices
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Wiring colour codes and electrical connectors
Layout of electrical components
Removing the tail light
Warning horn removal
Removing the rear direction indicators
Removing the front direction indicators
Visual and acoustic signalling system
Brake lights circuit
Light circuit of motorcycle
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Stand logic circuit
Bulb replacement
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RS125 3 (1998-2005) 
  • Information for owner
  • Introduction to manual
  • Maintenance
  • Troubleshooting
  • Engine and systems
  • Engine repair
  • Fuel system
  • Cooling and lube system
  • Running gear and frame
  • Frame and hinged elements
  • Front suspension and handlebar
  • Rear suspension
  • Brake system
  • Wheels and tires
  • Electric equipment
  • Equipment and devices
  • Starting and charging system
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