Release 00 - 11/2018
page 33
12.3. Adjusting the air gap and checking the coil
1 - Remove the cover and uncouple the conveyor.
2 - Make sure that the earth cable faston (10) of the
coil (11) is not oxidized; if it is, disconnect, clean and
remount it, spraying it with a special antioxidant.
3 - Check that the coil earth cable is intact. The
black spark plug cable (12) should not have any
cracks or signs of deterioration or burns which re-
duce its efciency and insulation level.
4 - Slack off the screw (13) and the stud (14) which
secure the coil (11).
At the bottom of the mach ine to which the engine
is tted, release the safety brake.
Rotate the ywheel (15) so as to bring the magnetic
inserts next to the poles of the core of the coil.
5 - Insert a 0,4 mm thickness gauge (16) between
the complete ywheel (15) and the coil poles (11),
push the coil until the poles come in contact with
the thickness gauge and secure screw (13) and
stud (14); with the ywheel locked, the airgap must
be 0,4 ± 0,05 mm.
NOTE: An accurate inspection of the ef-
ciency of a coil can only be carried out in a
laboratory equipped with a oscilloscope.
To make a brief check, proceed as follows:
6 - Disconnect the earth cable faston (10) of the
coil (11).
12. IGNITION
0,4 ± 0,05 mm
11
11
11
12
15
14
14
15
13
10
10
16
13
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