Release 00 - 03/2018
Engine TRE 0701-TRE 0702-TRE 0801
pag. 31
9. IGNITION
9.2. Adjusting the air gap and checking the coil
1 - Remove the cowl and the fan [
6.1].
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 - Make sure that the earth cable (6) is intact. The
black spark plug cable (8) should not have any
cracks or signs of deterioration or burns which re-
duce its efciency and insulation level.
4 - Loosen the screws (9) securing the coil (7), re-
lease the brake manually and rotate the ywheel
(10) until the magnetic inserts are lined up with the
poles of the coil core.
5 - Insert a 0.35 mm thickness gauge (11) between
the ywheel (10) and the coil poles (7). Push the coil
until the poles come in contact with the thickness
gauge and secure screws (9); tighten the screws
remembering that the air gap must be between
0.25 and 0.40 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 (6) of the coil
(7) and reposition the fan with the relative nut [
6.1], so that the starter can be activated.
8
6
7
0,25÷0,40 mm
9
10
11
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