Checking The Spark Plug - Yamaha YZ85W1 Service Manual

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.
4. Check:
• electrode
Damage / wear → Replace the spark plug.
• insulator
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
(with a wire thickness gauge)
Out of specification → Regap.
7. Install:
• spark plug
NOTE: NOTE:
Before installing the spark plug, clean the
spark plug and gasket surface.
8. Connect:
• spark plug cap
3-7
CHK
ADJ
Spark plug type (manufacturer)
BR10EG (NGK)
Spark plug gap
0.5 ~ 0.6 mm (0.0197 ~ 0.0236 in)
Spark plug
20 Nm (2.0 m•kg, 14 ft•lb)