23
ADJUSTING THE CONTATCT GAP AND IGNITION ADVANCE
These two operations are interrelated and proceed as follows.
-Screw the dial gauge support tool and the dial gauge into the spark plug hole.
-By rotating the flywheel, put the piston at TDC and set the dial gauge to zero.
-The breaker points are fully open at TDC. Check and if necessary, reset the gap between 0.35 and 0.45
mm (fig 66)
-Rotate the flywheel in the clockwise direction until the breaker points connect. With a test light, buzzer
or Ohm meter, determine when a connection is made. The testing device must be connected to the
short circuit (black) wire and to the ground of the engine (fig 67)
-At the moment of connection of the points, the test battery light will glow brightly, the buzzer will
change the acoustic frequency, or the Ohm meter will show approximately zero Ohms. On the dial
gauge, read off the value in mm of the ignition advance which must be from 1.8 to 2 mm BTDC.
-In case of excessive advance, the stator base plate should be rotated in the direction of engine rotation
(see arrow on flywheel). In case of insufficient advance, turn the plate in the opposite direction.
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