Magneto drawing (figure 36) is special tool to dismantle magneto rotor . firstly put the
mandril into the inside of shaft hole ,Turn the magneto rotor accordingly, screw magnet
o drawing and push-out magneto rotor
ELECTRICAL SYSTEM FUNDAMENTALS
A thorough study of the many types of electrical systems used in today’s
motorcycles is beyond the scope of this manual. However, a basic understanding of
electrical basics is necessary to perform simple diagnostic tests.
Refer to Electrical Testing in Chapter Two for typical test procedures and
equipment. Refer to Chapter Ten for specific system test procedures.
Voltage
Voltage is the electrical potential or pressure in an electrical circuit and is
expressed in volts. The more pressure (voltage) in a circuit the more work can be
performed.
Direct current (DC) voltage means the electricity flows in one direction. All circuits
powered by a battery are DC circuits.
Alternating current (AC) means the electricity flows in one direction momentarily
and then switches to the opposite direction. Alternator output is an example of AC
voltage. This voltage must be changed or rectified to direct current to operate in a
battery powered system.
Resistance
Resistance is the opposition to the flow of electricity within a circuit or component
and is measured in ohms. Resistance causes a reduction in available current and
voltage
Resistance is measured in an inactive circuit with an ohmmeter. The ohmmeter
sends a small amount of current into the circuit and measures how difficult it is to push
the current through the circuit.
An ohmmeter, although useful, is not always a good indicator of a circuit’s actual
ability under operating conditions. This is because of the low voltage (6-9 volts) the
meter uses to test the circuit. The voltage in an ignition coil secondary winding can be
several thousand volts. Such high voltage can cause the coil to malfunction, even
though it tests acceptable during a resistance test.
Resistance generally. Increases with temperature. Perform all testing with the
component or circuit at room temperature. Resistance tests performed at high
temperatures may indicate high resistance readings and cause unnecessary
replacement of a component.
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