Yamaha MX775 - SPARK PLUGS

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PERIODIC CHECKS AND ADJUSTMENTS
PERIODIC MAINTENANCE
PERIODIC MAINTENANCE
SPARK PLUGS
1. Remove:
• Spark plug caps “1”
• Spark plugs
2. Check:
• Spark plug type
Not correct  Replace.
• Electrode “1”
Wear/damage  Replace.
• Insulator color “2”
Not normal  Replace.
3. Measure:
• Spark plug gap “a”
Use a wire gauge or feeler gauge set.
Out of specification  Regap.
If necessary, clean the spark plugs with a spark
plug cleaner.
TIP
Before installing the spark plugs, clean the gasket surface
and plug surface.
Check and adjust the areas around the cylinder head
after the engine has cooled down completely.
WARNING
Before removing the spark plugs, use compressed air
to clean the cylinder head covers to prevent dirt from
falling into the engine.
NOTICE
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a
Spark plug type:
BPR6ES (NGK)
Feeler gauge set:
YU-26900-9
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)