Suzuki dl650 Owner's Manual page 47

Rear Side
1. Lift the fuel tank by referring to the
FUEL TANK LIFT section.
2. Remove the spark plug with the
spark plug wrench provided in the
tool kit.
NOTE:
Pry up the spark plug cap with
a screwdriver or a bar if it is hard to
remove by hand. Do not pull the spark
plug cord.
CAUTION
1
Cover the spark plug hole when-
ever spark plug is removed.
INSPECTION
46
Remove the carbon deposits periodi-
cally from the spark plug with a piece
of hard wire or pin. Readjust the
spark plug gap to 0.6
-
0.7 mm (0.024
-
0.028 in) by using a spark plug gap
thickness gauge. The spark plug
should be replaced every 12000 km
(7500 miles).
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 normal
operating spark plug should be very
light brown in color. If the spark plug
is very white or glazed appearing, it
has been operating much too hot.
This spark plug should be replaced
with the colder plug.