Honda CBR150R Manual page 45

MAINTENANCE
Measure the cylinder valve clearance by inserting a feeler
gauge between the valve lifter and cam lobe.
VALVE CLEARANCE:
IN: 0.16+ 0.03 mm (0.006t 0.001 in)
EX: 0 . 2 s
0.03
mm 10,018 0.001 in)
ADJUSTMENT
Remove the camshaft (page 10-5).
Remove the valve lifters and shims.
Clean the valve shim contact area in the valve lifter with
compressed air.
NOTE:
*
Shim may stick t o the inside of the valve lifter. Do
not
allow the shims to fall into the crankcase.
*
Mark all valve lifters and shims t o ensure correct
reassembly in their original locations.
*
The valve lifter can be easily removed with a valve
lapping tool
or
magnet.
*
The shims can be easily removed with a tweezers or
magnet.
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
0: Old shim thickness
NOTE:
*
Make sure of the correct shim thickness by measuring
the shim with the micrometer.
Reface the valve seat if carbon deposits result in a
calculated dimension of over 2.900 mm.
O O O Q
1.80 mm
1.825 mm
1.85 mm 1.875 m m
3-9