Specifications

b. Check the core and points for gap adjust-
ment. If any gap is incorrect, it should be
adjusted.
First adjust the core gap and then
1
core gap 5. upper contact
9 Locknut
2.Armature 6.Contact set
10
Adjusttng screw
3. Lower contact 7. co11
11.Yoke
4 Point gap 8 Adjusting spring
12 Contact
Spring
C.
Charging voltage output can be controlled
at the regulator. Inside the housing is a
screw that pushes against a flat spring
steel plate. This iJ the adjusting screw.
d. Before starting engine, disconnect wire
connector (coupler) containing 5 wires
from rectifier
(1 red, 1 black, 3 white).
Remove the RED wire from the con-
nector. Connect pocket tester
(DC20V)
red tester lead (+) to red wire from re-
ctifier. Connect tester black
(-) to good
ground. Start engine. Tester should
indicate 14.5
- 15 V (DC).
D. Checking silicon rectifier
1. Check silicon rectifier as specified using
the Yamaha Pocket Tester.
Contlnultv’ Con
1 Pocket tester
Element ~~~e~t
O.K.
shorted1
RETX~
Ielement
opened)
1 Wh,te
2 White
3 White
4 IBlack)
5 fRedI
Even if only one element is broken, re-
place assembly.
CAUTION:
/The silicon rectifier can be damaged if
: subjected to overcharging. Special care
should be taken to avoid a short circuit,
and/or incorrect connection of the
posi-
I
tive and negative leads at the battery.
/ Never connect the rectifier directly to the
battery to make a continuity check.
E. Battery
1. Checking
a. If battery sulfation (white accumulation)
occurs on plates due to lack of battery
electrolyte, the battery should be replaced.
b. If the bottoms of the cells are filled with
corrosive material falling off the plates,
the battery should be replaced.
2.
The service life of a battery is usually 2 to
3 years, but lack of care as described
below will shorten the life of the battery.
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