Honda C8R600F4 Service Manual page 54

MAINTENANCE
3-10
ADJUSTMENT
Remove the valve lifters and shims (page 8-4).
Clean the valve shim contact area in the valve lifter
with compressed air.
Measure the shim thickness and record it.
NOTE:
Sixty-nine different thickness shims are available
from the thinnest (1.200 mm thickness) shim to the
thickest (2.900
mm
thickness) in intervals of 0.025
mm.
Calculate the new shim thickness using the
equation below.
A==(B-C)
+
D
A:
New shim thickness
B: Recorded valve clearance
C: Specified valve clearance
D:
Old shim thickness
NOTE:
• Make sure of the correct shim thickness by meas-
uring the shim with the micrometer.
•Reface the valve seat if carbon deposits result in
a calculated dimension of over 2.900 mm.
Install the newly selected shims on the valve re-
tainers.
Install the valve lifters and camshafts (page 8-19).
Rotate the camshafts by rotating the crankshaft
clockwise several times.
Recheck the valve clearances.
Install the cylinder head cover (page 8-21).
eeee
1.80 mm
1.825 mm
1.85 mm 1.875 mm