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Cooling system diagram (Aprilia RS125/3)

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  • Aprilia
  • RS-series
  • RS 125 [3]
  • Engine and systems
  • Cooling and lube system
  • Cooling system diagram
0
An engine-driven centrifugal pump accommodated in the engine circulates coolant through the system. The pump takes in the coolant from the bottom section of the radiator and directs it through the ducts into the cylinders and cylinder heads to cool down engine internals.

When coolant expands from heat, the expansion reservoir takes up excess coolant.

"LOW" and "FULL" level marks facilitate coolant level inspection and top-up; see 2.10.1.

See 1.3.1 for more details on coolant.



1. Cylinder thermistor; 2. Expansion reservoir connection tubing; 3. Plain radiator cap (no breather); 4. Radiator to thermal expansion valve tube; 5. Centrifugal pump (intake); 6. Expansion reservoir; 7. 70° thermostat; 8. Breather union; 9. Radiator breather; 10. Radiator; 11. Cylinder head cover
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Aprilia RS125 3: Cooling and lube system
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Removing the engine oil tank
Coolant change
Radiator — removal and installation
Coolant thermistor — removal and installation
Thermostat — removal and installation
Expansion reservoir — removal and installation
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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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