PIAGGIO Runner 125 - Page 265

1) Look to see that the thermostat is not damaged.
2) Fill a metal container with approx. 1 litre of wa-
ter.
Immerse the thermostat, and keep it in the centre
of the container.
Immerse the multimeter temperature probe draw-
ing No° 020331Y closeà to the thermostat.
Heat the container with a hot air gun drawing No°
020151Y.
Check the temperature when the thermostat starts
to open:
Opening start temperature: 69.5 ÷72.5°C
Heat up until the thermostat is completely open.
Opening travel: 3.5 mm at 80°C
CAUTION - To execute the test correctly, make
sure neither the thermostat nor the thermometer
touches the container.
3) Replace the thermostat if it is not working prop-
erly.
Refitting
- Place the thermostat with the bleeding hole at the
highest point.
- Make sure that the rubber gasket is positioned
properly.
- Fit the thermostat cover with the connection for
the carburettor heating pipe facing the flywheel.
- Tighten the two screw to the torque indicated be-
low.
Locking torques (N*m)
Thermostat cover screws 3 ÷ 4
Runner 125 - 200 Cooling system
COOL SYS - 265