Inspecting The Spark Plug - um DSR EX 125 Workshop Manual

REGULAR INSPECTION
AND ADJUSTMENTS

INSPECTING THE SPARK PLUG

1. Extract:
- Spark plug connector.
- Spark plug.
ATTENTION
BEFORE REMOVING THE SPARK PLUG, BLOW AROUND IT
WITH COMPRESSED AIR TO REMOVE ANY DIRT, THEREBY
PREVENTING THIS FROM FALLING INTO THE ENGINE.
2. Check:
- Spark plug type
Incorrect =>
Standard spark plug:
NGK CR8EB
3. Inspect:
- Electrode (1).
Damage/warping/wear =>
- Insulator
Abnormal colour =>
The normal colour is a light brown.
4. Clean:
- Spark plug.
(Clean the spark plug with a spark plug cleaner or a wire
brush)
5. Measurement:
- Gap between the electrodes (a).
(using a feeler gauge)
Outside that specified =>
Distance between electrodes:
0,7 mm - 0,8 mm
6. Fit:
- Spark plug.
Spark plug.
1,2-1,4 kgf.m (12-14 N.m)
N.B.:
- BEFORE FITTING THE SPARK PLUG, CLEAN ITS SEATING
AND GASKET.
- IF NO TORQUE WRENCH IS AVAILABLE, A GOOD WAY
OF JUDGING THE CORRECT TORQUE IS TO TIGHTEN (1)
THE SPARK PLUG BY HAND AND THEN TIGHTEN IT FROM
¼ TO ½ A TURN (2).
- ALWAYS USE A NEW GASKET.
28 WORKSHOP MANUAL
Renew.
Renew.
(2).
Renew.
Adjust .