Honda CB 600F Hornet 2007 Shop Manual page 266

Inspect the cam chain tensioner B for excessive
wear or damage, replace it if necessary.
CAM CHAIN TENSIONER LIFTER
Check the cam chain tensioner lifter operation as
follows.
The tensioner shaft should no go into the body
when it is pushed.
When it is turned clockwise with the cam chain
tensioner holder or a screwdriver. the tensioner
shaft should be pulled into the body. The shaft
spring out of the body as soon as the stopper tool is
released.
VALVENALVE GUIDE
Check that the valve moves smoothly in the guide.
Inspect each valve for bending, burning or abnor­
mal stem wear.
Measure and record each valve stem O.D.
SERVICE LIMITS:
IN: 3.965 mm (0.156 1 in)
EX: 3.955 mm (0.1557 in)
Ream the guides to remove any carbon deposits
before checking clearances.
Insert the reamer from the combustion chamber
side of the cylinder head and always rotate the
reamer clockwise.
TOOL:
Valve guide reamer, 4.008 mm
CAM CHAIN TENSIONER B
07MMH-MV90100
CYLINDER HEAD/VALVES
SHAFT
8-17