Yamaha XV1600A1999 Service Manual page 80

CHECKING THE SPARK PLUGS
2. Disconnect:
3. Remove:
Before removing the spark plugs, blow away
any dirt accumulated in the spark plug wells
with compressed air to prevent it from fal-
ling into the cylinders.
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:
3-14
S spark plug cap
S spark plug
CAUTION:
S spark plug type
Incorrect ! Change.
Spark plugs
Model (manufacturer)
DPR7EA-9 (NGK)
X22EPR-U9 (DENSO)
S electrodes 1
Damage/wear ! Replace the spark plug.
S insulator 2
Abnormal color ! Replace the spark plug.
Normal color is medium-to-light tan.
S spark plug
(with a spark plug cleaner or wire brush)
S spark plug gap a
(with a wire gauge)
Out of specification ! Regap.
Spark plug gap
0.8 0.9 mm
S spark plug
S spark plug cap
S fuel tank
S rider seat
Refer to "FUEL TANK" and "SEATS AND
SIDE COVERS".
CHK
ADJ
18 Nm (1.8 mSkg)