6-20
SPARK PLUG INSPECTION
Measure the spark plug gap A with a
wire type feeler gauge. The standard
spark plug gap is 0.8 – 0.9 mm (0.031
– 0.035 in). If the measured spark
plug gap is out of standard range,
replace the spark plug with a new
one.
Whenever removing the carbon
deposits, be sure to observe the oper-
ational color of each spark plug’s por-
celain tip. This color tells you whether
or not the standard spark plug is suit-
able for your type of usage. A nor-
mally-operating spark plug should be
very light brown in color. If the spark
plug is very white or glazed appear-
ing, it has been operating much too
hot. This spark plug should be
replaced with a colder plug.
Plug Replacement Guide
NOTE: This motorcycle uses a resis-
tor-type spark plug to avoid jamming
electronic parts. Improper spark plug
selection may cause electronic inter-
ference with your motorcycle’s ignition
system, resulting in motorcycle per-
formance problems. Use only the rec-
ommended spark plugs.
NOTICE
An improper spark plug may have
an incorrect fit or inappropriate
heat range for your engine. This
may cause severe engine damage
which may not be covered under
warranty.
Use one of the spark plugs listed
or their equivalent. Consult your
Suzuki dealer if you are not sure
which spark plug is correct for
your type of usage.
NGK DENSO REMARKS
CR7EIA-9 IU22D
If the standard plug
is apt to get wet,
replace with this
plug.
CR8EIA-9 IU24D Standard
CR9EIA-9 IU27D
If the standard plug
is apt to overheat,
replace with this
plug.
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