Valve Stem-To-Guide Clearance - Honda CB400T Shop Manual

NOTE
Ream the guides t o remove any carbon
build-up before checking clearance.
HONDA
CYLINDER HEADIVALVE
C B 4 0 0 T
Measure and record each valve guide 1.0. using
a ball gauge or inside micrometer.
SERVICE LIMIT: IN. 5.60 mm (0.220 in.)
EX. 6.70 mm (0.264 in.)
VALVE STEM-TO-GUIDE
CLEARANCE
Inspect each valve for bending, burning,
scratches or abnormal stem wear.
Check the valve movement i n the guide.
Measure and record each valve stem O.D.
Subtract each valve stem 0.0. from the cor-
responding guide I.D. t o obtain the stem t o
guide clearance.
SERVICE LIMIT: IN. 0.10 mm (0.004 in.)
EX. 0.10 mm (0.004 in.)
O.D. SERVICE LIMIT:
IN. 5.44 mm (0.214 in.)
X. 6.54 mm (0.257 in.)
NOTE
the service limits, determine if a new
guide with standard dimensions would
bring the clearance within tolerance. I f
so, replace any guides as necessary and
If stem-to-guide clearance still exceeds the
service limits with new guides, replace the
valves and guides.
NOTE
Reface the valve seats whenever the
valve guider are replaced.
VALVE GUIDE REAMER
IN: 07984-2000000
6-10
Date of Issue: September, 1977
O
HONDA MOTOR CO., LTD.