25
MAGNETO SETTINGS AND ELECTRICAL EQUIPMENT
The voltage regulator should be checked when bulbs blow frequently. During the check, the engine
should be operating and the lights switched off-on, alternatively. The voltage should always read 12+/-
0.5 V. Before replacing the regulator, make sure the improper operation is not due to bad grounds.
The direction indicator relay should be checked within the wiring system. Previously check the bulbs
and direction indicators switch.
The STOP switch should be checked by a pilot bulb or OHM-meter. When replacing the switch, make
sure the new one is identical to the replaced one wince there are two types of STOP switches (those that
are switched on in neutral position, and those that are switched off in neutral position)
Electric wiring and combination switches are checked according to the wiring diagram. Check the
magneto components both within the wiring system and separately.
The flywheel should be checked by visual inspection for mechanical damage and proper cone fit. Check
deflection by help of the crankshaft. The maximum permissible axial deflection amounts to 0.1 mm and
radial deflection to 0.3 mm.
To check the capacitor it should be separated from other electrical components of the magneto. Check
the capacitor capacitance by means of a capacitance meter and the ability of the capacitor to retain an
electric charge.
NOTE: Caution is recommended in handling the non-insulated parts since there is a possibility of an
electric shock. The capacitor should, therefore, be discharged by connecting the two contacts.
Contact breaker: check the contacts and the cam nose for wear. Insert insulating mass between the two
breaker contacts and by an OHM-meter make sure the parts are electrically disconnected (there exists a
possibility of uncture on the bearing bush or fixing bolt insulation)
The ignition coil both external and internal can only be checked if a special mototester is available. The
checking procedure is laid down by the manufacturer of this device. If this is not available, a possible
fault can be established by replacing a truly good sample coil for the existing coil.
The lighting coil should be checked with engine in operation (2000-3000 RPM). To check the coil, use a
voltmeter and an approximate bulb of the same rated power (W) as the magneto.
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