Spark Plug; Valve Clearance - Honda CBR650F Service Manual

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MAINTENANCE

SPARK PLUG

Remove the PAIR control solenoid valve assembly
(page 7-20).
Release the wire guide [1] and disconnect the spark
plug caps [2].
Remove the spark plug [1].
Clean around the
spark plug base
Check the insulator for cracks or damage, and the
with compressed air
electrodes for wear, fouling or discoloration. Replace
before removing the
the plug if necessary.
plug, and be sure
that no debris is
SPECIFIED SPARK PLUG:
allowed to enter
CR9EH-9 (NGK)
into the combustion
U27FER9 (DENSO)
chamber.
Clean the spark plug electrodes with a wire brush or
special plug cleaner.
Check the gap between the center and side electrodes
with a wire-type feeler gauge.
SPARK PLUG GAP: 0.80 – 0.90 mm (0.031 – 0.035 in)
If necessary, adjust the gap by bending the side
electrode carefully.
Install and hand tighten the spark plug to the cylinder
head, then tighten the spark plug to the specified
torque.
TORQUE: 16 N·m (1.6 kgf·m, 12 lbf·ft)
Install the PAIR control solenoid valve assembly (page
7-20).

VALVE CLEARANCE

INSPECTION
• Inspect and adjust the valve clearance while the
engine is cold (below 35°C/95°F).
Remove the following:
– Cylinder head cover (page 10-4)
– Timing hole cap and O-ring
Rotate the crankshaft clockwise slowly and align the "T"
mark [1] with the index notch [2] in the crankcase cover.
3-6
[1]
[2]
[1]
[2]
[1]