Spark Plug; Ignitor Unit - Suzuki Katana 1100 Service Manual

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ElECTRICAL SYSTEM 6-10
SPARK PLUG
The plug gap is adjusted to 0.6 - 0.7 mm (0.02 - 0.03 in). The
gap is correctly adjusted by using a thickness gauge. When
carbon is deposited on the spark plug, remove the carbon with
a spark plug cleaning machine or by carefully using a tool with
a pointed end. If the electrodes are extremely worn or burnt,
replace the plug. Also replace the plug if it has a broken
insulator, damaged thread, etc.
NGK JR9B as listed in the table should be used as the standard
plug. However, the heat range of the plug should be selected
to meet the requirements of speed, actual load, fuel, etc. If the
plugs need be replaced, it is recommended that ones having
a heat range closest to the standard plug in the table be
selected. Remove the plugs and inspect the insulators. Proper
heat range would be indicated if all insulators were light brown
in color. If they are baked white, they should be replaced by
a cold type NGK JR' OB.
Recommended spark plug
[ ~ I
Standa'd
J
Cold type
u_j
L
NGK •
JR9B --~---
JR' OB
NOTE
"R" type spark plug is installed for some specifications. "R"
type spark plug has a resister located at the center electrode
to prevent radio noise.
IGNITOR UNIT
• Remove the spark plugs from Nos.' and 2 cylinders and
place the spark plugs on the cylinder head .
• Start the engine and check the sparks of respective spark
plugs. If no sparking at spark plug gap, replace the IGNITOR
UNIT or inspect the signal generator, ignition coils and spark
plugs. If the signal generator, ignition coils and spark plugs
checked are correct, the IGNITOR UNIT may be faulty,
replace it with a new one
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"1
jO.6 -- 0.7
mm
f
1 0.02 -- 0.03
In)
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