Honda CBR650RA Shop Manual page 271

dummyhead dummyhead
Remove the valve spring cotters [1] using the special
To prevent loss of
tools as shown.
tension, do not
compress the valve
TOOLS:
springs more than
[2] Valve spring compressor
necessary to
[3] Valve spring compressor
remove the cotters.
attachment
Remove the valve spring compressor and remove the
Mark all parts
following:
during disassembly
so they can be
– Valve spring retainers [1]
placed back in their
– Valve springs [2]
original locations.
– Valves [3]
– Valve stem seals [4]
– Valve spring seats [5]
Remove the carbon deposits from the combustion
Avoid damaging the
chamber [6] and clean off the cylinder head gasket
cylinder mating
surface.
surface and valve
seat surfaces.
INSPECTION
Inspect the following parts for damage, abnormal wear, deformation, burning or clogs in oil passages.
– Cylinder head
– Valve springs
– Valves
– Valve guides
– Cam chain
– Cam chain timing sprocket
– Cam chain guide A
– Cam chain tensioner
Measure each part and clearance according to CYLINDER HEAD/VALVES SPECIFICATIONS (page 1-8).
Replace any part if it is out of service limit.
• Ream the valve guide using the valve guide reamer to remove any carbon build up before measuring the
guide (page 10-14).
• Refer to valve seat inspection (page 10-15).
[2]
07757-0010000
07959-KM30101
CYLINDER HEAD/VALVES
[3]
[6]
[5]
[4]
[3]
[1]
[2]
[1]
10-13