Suzuki VZR1800/BZ Owner's Manual page 69

SPARK PLUG CLEANING
Readjust the spark plug gap to 0.6 –
0.7 mm (0.024 – 0.028 in) with a
spark plug gap thickness gauge. The
spark plug should be replaced every
12000 km (7500 miles).
Before removing the carbon deposits,
observe the color of the porcelain tip
of each spark plug. This color tells
you whether or not the standard spark
plug is suitable for your type of usage.
If the standard plug is wet appearing
or dark in color, the hotter spark plug
may be more suitable. A normally-
operating spark plug should be light
brown in color. If the spark plug is
white or glazed appearing then it has
been operating much too hot. This
spark plug should be replaced with a
colder plug.
0.6 – 0.7 mm
PLUG REPLACEMENT GUIDE
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
CR7EK U22ETR
CR8EK U24ETR
CR9EK U27ETR
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.
6-17
REMARKS
If the standard plug is
apt to get wet,
replace with this
plug.
Standard
If the standard plug is
apt to overheat,
replace with this
plug.