Yamaha YBR125ED Service Manual download pdf (Page 67)

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CHECKING THE SPARK PLUG

EAS00060

CHECKING THE SPARK PLUG

1. Disconnect:

• spark plug cap

2. Remove:

• spark plug

CAUTION:

_

Before removing the spark plug, blow away

any dirt accumulated in the spark plug well

with compressed air to prevent it from fall-

ing into the cylinder.

3. Check:

• spark plug type

Incorrect

→

Change.

Spark plug type (manufacturer)

CR6HSA (NGK)

4. Check:

• electrode

1

Damage/wear

→

Replace the spark plug.

• insulator

2

Abnormal color

→

Replace the spark plug.

Normal color is medium-to-light tan.

5. Clean:

• spark plug

(with a spark plug cleaner or wire brush)

6. Measure:

• spark plug gap

a

(with a wire thickness gauge)

Out of specification

→

Regap.

7. Install:

• spark plug

NOTE:

_

Before installing the spark plug, clean the

spark plug and gasket surface.

8. Connect:

• spark plug cap

Spark plug gap

0.6 ~ 0.7 mm (0.024 ~ 0.028 in)

T

R

.

.

13 Nm (1.3 m · kg, 9.4 ft · lb)

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