Gilera 633721 Workshop Manual page 161

Nexus 500 euro 3
- Repeat for the reference between driving pulley
and transmission housing.
- Replace the inspection cap on the flywheel side.
- Connect the diagnostic tester.
- Start the engine.
- Select the «parameter» function in this menu.
- Select the stroboscopic light command in the tra-
ditional four-stroke engine position (1 spark 2
revs).
- Check that the real values of rpm and ignition
advance match those measured using the diag-
nostic tester.
Specific tooling
020460Y Scooter diagnosis and tester
If the values do not match, check:
- distribution timing
- rpm-timing sensor
- injection control unit
Inspecting the radial air gap
- Align a tooth of the tone wheel with the revolution timing sensor.
- Check the air gap using a probe.
Characteristic
Standard air gap:
from 0.20 to 0.70 mm
Engine
ENG - 161