Suzuki DL650K5 Service Manual page 29

NO.2 (REAR) SPARK PLUG REMOVAL
• Remove the seat. (!7-4)
• Lift and support the fuel tank. (!5-7)
• Remove the spark plug cap.
• Remove the spark plug with the special tool.
$09930-10121: Spark plug socket wrench set
HEAT RANGE
• Check to see the heat range of the plug.
Standard
NGK CR8E
DENSO U24ESR-N
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 A
Standard: 0.7 – 0.8 mm (0.028 – 0.031 in)
$ 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.
"
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 dam-
age may result.
Cold type Hot type
CR9E CR7E
U27ESR-N U22ESR-N
PERIODIC MAINTENANCE 2-7