Honda CBR650RA Shop Manual page 264

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CYLINDER HEAD/VALVES
If you replace the camshaft and/or cam sprocket,
Be careful not to let
loosen the cam sprocket bolts [1].
the cam chain
guide bolts fall into
• Turn the crankshaft clockwise one full turn (360°),
the crankcase.
loosen the other cam sprocket bolts, then reset the
No.1 piston to the TDC (Top Dead Center) on the
compression stroke (page 3-8).
Remove the bolts [2] and cam chain guide B [3].
From outside to inside, loosen the bolts in a crisscross
pattern in several steps or the camshaft holder might
break.
Loosen the camshaft holder bolts [1] gradually in a
Be careful not to let
crisscross pattern in 2 or 3 steps, and remove them and
the camshaft holder
washers [2].
bolts fall into the
crankcase.
Remove the camshaft holders [3] with the dowel pins
from the cylinder head.
• Do not forcibly remove the dowel pins from the
camshaft holders.
Remove the camshafts [4] by removing the cam chain
from the cam sprockets.
• Attach a piece of wire to the cam chain to prevent it
from falling into the crankcase.
Remove the valve lifters [1] and shims [2].
• Be careful not to damage the valve lifter bore.
• Shim may stick to the inside of the valve lifter. Do
not allow the shims to fall into the crankcase.
• Mark all valve lifters and shims to ensure correct
reassembly in their original locations.
• The valve lifter can be easily removed with a valve
lapping tool or magnet.
• The shims can be easily removed with a tweezers or
magnet.
INSPECTION
Inspect the following parts for damage, abnormal wear,
deformation, burning or clogs in oil passages.
– Cam sprockets/camshafts
– Camshaft holders/dowel pins
– Cam chain guide B
Measure each part according to CYLINDER HEAD/
VALVES SPECIFICATIONS (page 1-8).
Replace any part if it is out of service limit.
10-6
[3]
[1]
[3]
[1]
[1]/[2]
[2]
[2]
[4]
[1]