Suzuki DR600S - Page 20

PERIODIC
MAINTENANCE
AND
TUNE-UP
PROCEDURES
2-8
SPARK PLUGS
Clean Every 6 000 km (4 000 miles) and
Replace Every 12 000 km (7 500 miles)
The plug gap is adjusted to 0.8 — 0.9 mm (0.03 —
0.04 in). The gap is correctly adjusted by using a
thickness gauge. When carbon is deposited on the
spark plug, remove the carbon with a tool with a
pointed end. If the electrodes are extremely worn
or burnt, replace the plug. Also replace the plug if
it has a broken insulator, damaged thread, etc.
NGK DP9EA-9 or NIPPON DENSO X27EP-U9 as
listed in the table should be used as the standard
plug. However, the heat range of the plug should
be selected to meet the requirements of speed,
actual load, fuel, etc. If the plugs need to be
replaced, it is recommended that the standard
plugs listed in the table be selected. Remove the
plugs and inspect the insulators. Proper heat range
would be indicated if all insulators were light
brown in color. If they are blackened by carbon,
they should be replaced by a hot type NGK
DP8EA-9 or NIPPON DENSO X24EP-U9.
NOTE:
To check the spark plugs, first make sure that
the fuel tank contains unleaded gasoline, and
after a test ride if the plugs are either sooty
with carbon or burnt white, replace them.
_——
NOTE:
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.
Gap 0.8 — 0.9mm
(0.03 — 0.04 in)
NIPPON
DENSO REMARKS
NGK
If the standard plug is
apt to get wet, replace it |
with this hot type plug.
DP8EA-9
X24EP-U9
DP9EA-9 X27EP-U9
“R”’ type spark plug
NIPPON
DENSO
NGK REMARKS
If the standard plug is
apt to get wet, replace it
with this hot type plug.
NOTE:
“R” type spark plug is installed for some
specifications. “‘R’” type spark plug has a
resister located at the center electrode to
prevent radio noise.
DPR8EA-9 X24EPR-U9