- Rotate the driving pulley fan using a screwdriver
until the reference marks between the flywheel
and flywheel cover coincide as shown in the pho-
tograph.
- Bring the reference mark onto the transmission
side between the fan and the transmission cover
as shown in the photograph.
- Refit the spark plug.
- Refit the plastic cap on the flywheel cover.
- Adjust the spark gap to the contact position (no
reference mark visible) and install it on engine be-
tween the spark plug and spark plug cap
- Connect the induction clamp on the spark gap
cable respecting the proper polarity (the arrow on
the clamp must be pointing at the spark plug).
- 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.
If the values do not correspond, check:
- distribution timing
- rpm-timing sensor
- injection control unit
Specific tooling
020460Y Scooter diagnosis and tester
020330Y Stroboscopic light to check timing
020621Y HV cable extraction adaptor
Maintenance Beverly Tourer 250 i.e.
MAIN - 30
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