Cam Chain Guide - Honda 1998 VT750C Service Manual

CYLINDER HEAD/VALVES
Ream the valve guide to remove any carbon build-up
before measuring the guide.
Insert the reamer from the combustion chamber side
of the head and always rotate the reamer clockwise.
NOTE:
Take care not to tilt or lean the reamer in the
guide while reaming .
• If reaming irregular, oil will leak past the valve
stem seal. If could cause improper seat contact
that cannot be corrected by refacing .
• Rotate the reamer clockwise, never counterclock-
wise when inserting and removing.
Measure each valve guide I.D. and record it.
Subtract each valve stem O.D. from the correspond-
ing guide I.D. to obtain the stem-to-guide clearance.
SERVICE LIMITS:
IN: 5.56 mm (0.219 in)
EX: 6.65 mm (0.262 in)
07984-2000001 or
07984-2000000
(U.S.A. only)
07984-ZE20001 or
07984-ZE20000
(U.S.A. only)
6.612 mm (EX)
TOOLS:
Valve guide reamer
5.510 mm (IN)
SERVICE LIMITS:
IN: 0.10 mm (0.004 in)
EX: 0.11 mm (0.004 in)
If the stem-to-guide clearance exceeds the service
limit, determine if a new guide with standard dimen-
sions would bring the clearance within tolerance.
If so, replace any guides as necessary and ream to fit.
If the stem-to-guide clearance exceeds the service
limit with new guide, also replace the valve.
NOTE:
Inspect and reface the valve seats whenever the
valve guides are replaced (see page 10-18).
CAM CHAIN GUIDE
Check the cam chain guide for wear or damage.
Replace the cam chain guide if necessary.
10-17