Suzuki DL650 Service Manual page 27

PERIODIC MAINTENANCE 2-7
N0.2 (REAR) SPARK PLUG REMOVAL
Remove the seat. (-7-4)
Lift and support the fuel tank. ( W 5 - 7 )
Remove the spark plug cap.
Remove the spark plug with the special tool.
a09930-10121: Spark plug socket wrench set
HEAT RANGE
Check to see the heat range of the plug.
I
Standard
I
Cold t v ~ e
1
Hot t v ~ e
\ I I
-.
I
* .
1
NGK
1
CR8E CR9E CR7E
I
CARBON DEPOSIT
Check to see if there are carbons deposit on the plugs. If car-
bon is deposited, remove it with a spark plug cleaner machine
or carefully using a tool with a pointed end.
SPARK PLUG GAP
Measure the plug gap with a thickness gauge. If out of specifi-
cation, adjust it to the following gap.
Spark plug gap
@
Standard: 0.7
-
0.8 mm (0.028
-
0.031 in)
a
09900-20803: Thickness gauge
--
ELECTRODES CONDITION
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, damaged thread.
- 1
plug. If the reach is too short, carbon will be deposited
on the screw portion of the plug hole and engine dam-
age may result.