Yamaha XS650SE, Shop Manual

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and thechassis lead
is
for the (-) terminal.
Make sure the breather pipe is properly
connected, properly routed, and is not
damaged or obstructed.
NOTE:
The battery must be charged before using
to insure maximum performance. Failure
to properly charge the battery before first
use, or a low electrolyte level, will cause
premature failure of the battery.
Charging current: 1.4 Amp
Charging hours: 10 hrs
F. Spark plug
The spark plug indicates how the engine is
operating. If the engine is operating correctly,
and the machine is being ridden properly, the
tip of the white insulator around the positive
electrode of the spark plug will be a medium
tan color. If the insulator is very dark brown
1. If the insulator is very dark brown or
black color, then a plug with a hotter heat
range might be required. This situation is
quite common during the engine break-in
period.
2. If the insulator tip shows a very light tan
or white color or is actually pure white
and glazed, or if electrodes show signs of
melting, then a spark plug with a colder
heat range is required. Remember, the
insulator area surrounding the positive
electrode of the spark plug must be a
medium tan color. If it is not, check
carburetion, timing and ignition adjust-
ments.
3. The spark plug must be removed and
checked. Check electrode wear, insulator
color, and electrode gap.
Spark plug gap:
0.7 0.8 mm (0.028 0.031 in)
Engine heat and combustion chamber de-
posits will cause any spark plug to slowly
break down and erode. If the electrodes
finally become too worn, or if for any reason
you believe the spark plug is not functioning
correctly, replace it. When installing the plug,
always clean the gasket surface, use a new
sent on the surface of the spark plug, and
torque the spark plug properly.
Standard spark plug:
Champion N-7Y or NGK BP 7ES
Tightening torque:
2.0 m-kg (14 ft-lb)
G. Headlight
1.
Headlight beam adjustment.
When necessary, adjust the headlight
beam as follows:
a. Adjust horizontally by tightening or
loosening the adjust screw.
To adjust to the right:
Tighten the screw
To adjust to the left:
Loosen the screw
b. Adjust vertically as follows:
1) Loosen adjusting screw and adjust ver-
tically by moving the headlight body.
2) Retighten the screw.
1. Vertical adjustment
2. Horizontal adjustment
2. Replacing the headlight bulb.
a. Loosen bolts and replace bulb.
b. After installing, adjust headlight beam.
NOTE:
Take care not to damage the headlight. It
gasket, wipe off any grime that might be pre-
15
is very fragile.