Release 00 - 02/2008
Engine WBE 0701-WBE 0704
pag. 29
Service manual
10. IGNITION
10.2. Adjusting the air gap and checking the coil
1 - Remove the starter assembly
.
2 - Make sure that the earth cable faston (6) of the
coil (7) 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 (8) should not have any
cracks or signs of deterioration or burns which re-
duce its efficiency and insulation level.
4 - Slack off the screw (9) and the stud (10) which
secure the coil (7).
At the bottom of the machine to which the engine
is fitted, release the safety brake.
Rotate the flywheel (
11) so as to bring the magnetic
inserts next to the poles of the core of the coil.
5 - Insert a 0.35 mm thickness gauge (12) between
the flywheel (
11) and the coil poles (7). Push the coil
until the poles come in contact with the thickness
gauge and secure screw (9) nd stud (10); with the
flywheel locked, the airgap must be between 0.25
mm and 0.40 mm.
NOTE: An accurate inspection of the effi-
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 (6) of the
coil (7).
7
8
10
11
9
6
0,25÷0,40 mm
6
<< BACK >>
back to the index
