Specifications

Chapter 3 Ignition system
Refer to Chapter 7 for information relating to the 1985 on Brazilian models
Contents
General description
Generator : checking the output
Contact breaker : adjustment
Contact breaker : removal and renewal
Checking the ignition timing
1
2
3
4
5
Ignition coil : checking
Condenser : location, removal and replacement
Spark plug : checking and re-setting the gap
Fault diagnosis
6
7
8
9
Specifications
Ignition timing
Initial - 'F' mark aligned 20° BTDC static or at idle speed
Advance starts at 1800 rpm
Full advance at 35° BTDC e 3000 rpm
Ignition system
Ignition HT coil spark gap 8 mm (0.32 in) minimum
Condenser capacity ... 0.22 - 0.26 microfarad
Contact breaker gap:
Nominal 0.35 mm (0.014 in)
Tolerance for ignition timing 0.30 - 0.40 mm (0.012 - 0.016 in)
Contact breaker spring pressure 750 g (1.65 1b)
Spark plug
Make NGK ND
Type:
CG125 model - original/current recommendation D8ES-L7D8EA X24ES/X24ES-U
CG125 K1, B, C, E DR8ES-L X24ESR-U
Electrode gap 0.6 - 0.7 mm (0.024 - 0.028 in)
1 General description
The spark which is necessary to ignite the petrol/air mixture
in the combustion chamber is derived from an ignition coil
mounted on the frame and a flywheel generator attached to the
left-hand crankshaft of the engine. A contact breaker assembly
within the generator determines the exact moment at which the
spark will occur; as the points separate the electrical circuit is
interrupted and a high tension voltage is developed across the
points of the spark plug which jumps the gap and ignites the
mixture.
2 Generator: checking the output
1 The generator coil is instrumental in creating the power in
the ignition system, and any failure or malfunction will affect the
operation of the ignition system. Should a generator fault be
indicated, reference should be made to Chapter 6.
IGNITION COIL /CONDENSER
SPARK PLUGl '—'
A
CONTACT
BREAKER
77777 77777
Fig. 3.1 Ignition system: schematic diagram