Suzuki VLR1800 Service Manual page 37

Spark Plug Replacement
Replace spark plug
Every 12 000 km (7 500 miles, 24 months)
Refer to "Ignition Coil / Plug Cap and Spark Plug Cap
Removal and Installation in Section 1H (Page 1H-4)".
Spark Plug Inspection and Cleaning
Inspect spark plug
Every 6 000 km (4 000 miles, 12 months)
Heat Range
1) Remove the spark plugs. Refer to "Ignition Coil /
Plug Cap and Spark Plug Cap Removal and
Installation in Section 1H (Page 1H-4)".
2) Check spark plug heat range by observing electrode
color.
If it appears white or glazed, replace the spark plug
with colder type one.
Heat range
Standard
NGK CR7EK
DENSO U22ETR
3) After finishing the spark plug inspection, reinstall the
removed parts.
Carbon Deposits
1) Remove the spark plugs. Refer to "Ignition Coil /
Plug Cap and Spark Plug Cap Removal and
Installation in Section 1H (Page 1H-4)".
2) Check carbon deposits on the spark plug.
If carbon is deposited, remove it using a spark plug
cleaner machine or carefully use a tool with a
pointed end.
3) After finishing the spark plug inspection, reinstall the
removed parts.
Spark Plug Gap
B822H10206004
1) Remove the spark plugs. Refer to "Ignition Coil /
Plug Cap and Spark Plug Cap Removal and
Installation in Section 1H (Page 1H-4)".
2) Measure the spark plug gap using a thickness
gauge.
Adjust the spark plug gap if necessary.
Spark plug gap "a"
B822H10206005
0.6 – 0.7 mm (0.024 – 0.028 in)
3) After finishing the spark plug inspection, reinstall the
Cold type
removed parts.
CR8EK
U24ETR
Electrodes Condition
1) Remove the spark plugs. Refer to "Ignition Coil /
Plug Cap and Spark Plug Cap Removal and
Installation in Section 1H (Page 1H-4)".
2) Check to see the worn or burnt condition of the
electrodes.
If it is extremely worn or burnt, replace the plug. And
also replace the plug if it has a broken insulator, or
damaged thread.
Confirm the thread size and reach when
replacing the plug. If the reach is too short,
carbon will be deposited on the screw
portion of the plug hole and engine damage
may result.
3) After finishing the spark plug inspection, reinstall the
removed parts.
I649G1020010-02
Maintenance and Lubrication:
" a " " a "
CAUTION
!
0B-10
I822H1020005-02