Technical data

CHECKING THE SPARK ADVANCE

- To check the ignition advance, use the stroboscopic lamp

with induction collet connected to the spark plug power su-

pply cable.

- Connect the induction collet according to the right polarity

(the arrow on the collet must be facing the spark plug).’

- Set the lamp selector to the central position (1 spark = 1

driving shaft revolution as in 2 stroke engines).

- Start the engine and check that the lamp is in good working

order and that the rpm counter reads high speeds too (e.g.

8,000 rpm).

- If you detect abnormal flashes or rpm reads, increase the

resistive load on the spark plug supply line (10 - 15 KQ in

series with the H.V. cable).

Version 125

- Remove the slit plastic cap on the flywheel cover.

- Adjust the lamp flash dephasing corrector to make the re-

ference on the flywheel cover collimate with the level on the

water pump drive. Read the advance degrees indicated by

the stroboscopic lamp.

Characteristic

Ignition advance (before T.D.C) 125

10° ± 1° at 2000 r.p.m. - 34° ± 1° at 6000 r.p.m

Version 250

- Remove the spark plug.

- Remove the plastic cover from the slotted hole on the

flywheel cover, indicated in the picture.

C CG S C