4. Clean:
• spark plug
(with a spark plug cleaner or wire brush)
5. Measure:
• spark plug gap
Use a wire gauge or thickness gauge.
Out of specification → Regap.
6. Tighten:
• spark plug
Spark plug gap
0.6 ~ 0.7 mm (0.024 ~ 0.028 in)
T
R
.
.
11 Nm (1.1 m · kg, 8.0 ft · lb)
a
CHECKING THE SPARK PLUG/
CHECKING THE IGNITION TIMING
Engine idling speed and throttle cable free play
should be adjusted properly before checking
the ignition timing.
1. Remove:
• Shroud cap
2. Attach:
• engine tachometer
• timing light
(to spark plug lead)
TIP
1
a
1
a
3. Check:
• ignition timing
a. Warm up the engine and keep it at the
specified speed.
Engine speed
1,600 ~ 1,800 r/min
CHECKING THE IGNITION TIMING
b. Visually check the stationary pointer
to
verify it is within the required firing range
indicated on the rotor.
Incorrect firing range → Check the pickup
coil.
1
2
F
T
1
2
CHK
ADJ
a
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