Ignition System; Ignition Circuit Diagram; Governor Assembly; Spark Gap Test - Yamaha XS650SE Shop Manual

Yamaha xs650 series motorcycles shop manual
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a. Negligence in keeping battery topped off
with distilled water.
b. Battery being left discharged.
c. Over-charging with heavy charge.
d. Freezing.
e. Filling with water or sulfuric acid contain-
ing impurities.
f. Improper charging voltage or current on
new battery.
Battery
Specific gravity: 1 .2B
1.4 amp
1.4 amp until specific
gravity reaches 1.28
Refill fluid
Distilled water
Check once per month
3.
If the motorcycle is not to be used for a
long 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.
Recharge the battery before reinstallation.
C.

6-3. IGNITION SYSTEM

A. Ignition circuit diagram
r
1.
Ignition coil
5. Fuse (ZOA)
2. Spark plug
6. Battery
3. Engine stop switch
4. Main switch
B. Governor assembly
1. Inspection
a. Both weights must pivot smoothly or
ignition advance will not occur at the
proper rpm, nor will it advance to its
fullest extent. On occasion, lightweight
grease must be applied to the weight pivot
pins.
b. Check the operation of the point cam on
the shaft. It must rotate smoothly.
c. Examine point cam surface. If surface is
pitted or worn, the governor assembly
must be replaced.
C. Spark gap test
The entire ignition system can be checked for
misfire and weak spark using the Electro
Tester. If the ignition system will fire across a
sufficient gap, the engine ignition system can
be considered good. If not, proceed with
individual component tests until the problem
is found.
1. Warm up engine throughly so that all
electrical components are at operating
temperature.
2. Stop engine and connect tester as shown.
2. Plug wre from coil
3. Spark plug
3. Start engine and increase spark gap until
misfire occurs. (Test at various rpm's
between idle and red line.)
Minimum spark gap:
6 mm (0.24 in)
D. Ignition coil
1. Coil spark gap test.
a. Remove fuel tank and disconnect ignition
coil from wire harness and spark plug.
b. Connect Electro Tester as shown.
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Xs650sfXs6502fXs650eXs650sgXs650gXs650 series

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