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Yamaha XS750 Manual page 127

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Even if only one element is broken, replace
assembly.
CAUTION:
The silicon rectifier can be
damaged if subjected t o overcharging. Special
care should be taken t o avoid a short circuit
and/or incorrect connection of the positive
and negative leads a t the battery. Never con-
nect the rectifier directly t o the battery t o
make a continuity check.
E. Battery
1. Checking
a. I f battery sulfation (white accumulation)
occurs on plates due to lack of battery elec-
trolyte.
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.
c. If the battery shows the following defects,
it should be replaced:
1) The voltage will not rise to a specific value
e v e n after many hours of charging.
2) No
gassing occurs in any cell
The battery requires a charging voltage of
3)
more than regulating voltage in order t o
supply a current o f 1.4A for 10 hours.
2. The service life of a battery is usually 2 t o 3
years, but lack of care as described below will
shorten the l i f e of the battery.
a. Negligence in keeping battery topped o ff with
distilled water.
b. Battery being l e f t discharged.
c. Over-charging with heavy charge.
d. Freezing.
e. Filling with water or sulfuric acid containing
impurities.
Improper charging voltage or current on new
f.
battery.
Battery
Electrolyte
Initial charging
current
Recharging
current
Refill fluid
Refill period
If the motorcycle is not t o be used for a long
3.
time, remove the battery and have it stored.
The following instructions should be observed:
a. Recharge the battery periodically.
b. Store the battery in a cool, dry place.
c. Recharge the battery before reinstallation.
6-3 IGNITION SYSTEM
A. Ignition Circuit Diagram
B R E A K E R
I
B.
Governor Assembly
1. Inspection
a. Both weights must pivot smoothly or ignition
advance will not occur a t the proper rpm, nor
will
it advance t o i t s fullest extent. On oc-
casion, lightweight grease must be applied t o
the weight pivot pins.
I
1 2V 14AH
Specific gravity: 1.28
Quantity: 81Occ
10
1.4 amp for
hours
(new battery)
10 hours
(or until specific
gravity reaches 1.28)
Distilled water
(t o maximum level line)
Check once per month
(or more often, as
required)
ENGINE STOP
SWITCH

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Xs750dXs750-2d