Honda CB160 Shop Manual page 109

5. 5 SELF-STARTER
b.
Attention is directed to magnetic force : Insure
that the roller spring and other parts around the
clutch are not magnetized, as roller movement is
affected by even small resistance.
c. At assembly, insure that small parts (the spring
cap, etc.) are assembled as they are drawn toward
the rotor by magnetic force ; AC generation may
be destroyed by movement of the rotor.
C.
Starter solenoid
As the current for rotation of the starting motor
attains l 00 A, heavy wire is required to reduce the
resistance. The contact section of the switch em-
ployed for interruption of this current should also be
large.
It is difficult to install the switch when applying
DC
current to starting motor.
In such a case, a switch employing an electro-
magnet is installed at the most convenient position
(between the battery and starting motor) with another
switch installed at a different location for remote-
control which operates the electromagnet by a small
current. (Refer to Fig.
5.
85)
1.
Principle of operation
a. When current is applied to the primary side, the
electromagnet operates, and attracts the iron core
which resists spring force.
b. The contact point at the tip of the iron core
connects the secondary circuit. (Refer to fig.
5. 86)
2.
Caution
a.
When 12 V current is applied between terminals
of the secondary circuit, and if a " click " sound
is heard, the contact points of the secondary circuit
are closed.
b. During prolonged use, the contact sections are
burned due to large current and, resistance increases
to block the current (in many cases, even when the
click is heard, the starting motor does not turn).
In such a case, by disassembly, the contact
sections should be polished with a file or sand-
paper to obtain favorable contact. Disassembly
should be performed with the switch removed from
the body.
c. The current at the primary side should be below
12 V, 3.5 A (Refer to Fig. 5. 87
and
5. 88)
Fig. 5. 85 Starter solenoid
CONT ACTOR
SOLENOID COIL (MOVING SIDE)
(PRIMARY COIL)
PLUNGER
Fig. 5. 86 Construction of starter solenoid
fig, 5. 87
Disassembly of soienoid (when the cov&r
is opem,dl
fig.
5, 88 Dis assembly of solenoid (components!
105