Checking The Spark Plug - Yamaha YJ125S Service Manual

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CHECKING THE SPARK PLUG

EAS00060
CHECKING THE SPARK PLUG
1. Remove:
2. Disconnect:
3. Remove:
cC
Before removing the spark plug, blow away
any dirt accumulated in the spark plug well
with compressed air to prevent it from falling
into the cylinder.
4. Check:
5. Check:
6. Clean:
7. Measure:
8. Install:
NOTE:
Before installing the spark plug, clean the spark
plug and gasket surface.
9. Connect:
10.Install:
3-15
8 cover
Refer to "COVER AND PANEL".
8 spark plug cap
8 spark plug
8 spark plug type
Incorrect Change.
Spark plug type (manufacturer)
CR7E (NGK)
8 electrode 1
Damage/wear Replace the spark plug.
8 insulator 2
Abnormal color Replace the spark plug.
Normal color is medium-to-light tan.
8 spark plug
(with a spark plug cleaner or wire brush)
8 spark plug gap a
(with a wire Thickness gauge)
Out of specification
Spark plug gap
0.7 ~ 0.8 mm (0.028 ~ 0.032 in)
8 spark plug
12.5 Nm (1.25 m • kg, 9 ft • lb)
8 spark plug cap
8 cover
Refer to "COVER AND PANEL".
CHK
ADJ
Regap.