ENGINE MECHANICALS
NOTE:
a
When grinding the crankpin journal, finish each crankpin journal should be finished so that its radius
at the corner becomes
0.25
mm.
@
On Type
CB-61
engine, no undersize bearing is available.
WM-05:
Bearing size
@
Checking connecting rod thrust clearance
Measure the thrust clearance between the connecting
rod and the crankshaft, using a thickness gauge.
Thrust clearance
[CB-23
Engine]
0.15
-
0.38
mm
(0.0059
-
0.0150
inch)
[CB-61
Engine]
0.15
-
0.38
mm
(0.0059
-
0.0150
inch)
[CB-80
Engine]
0.1
5
-
0.45
mm
(0.0059
-
0.01
77
inch)
Crankpin journal diameter
Engine type
NOTE:
The thrust clearance should be measured while the con-
necting rod being pushed against either side of the
crankshaft in the axial direction. Measure the clearance at
the opposite side.
1
I
Fig.
5-260
WM-05305
CB-23
@ If the clearance exceeds the specified value, replace the connecting rod or the crankshaft, or both
of them, referring to the width of the big end of the connecting rod in the thrust direction and the
side width of the
crankpin journal.
CB-61 CB-80
I
Repair standard
39.958
-
39.992 39.958
-
39.992 42.962
-
42.992
'
(1.573
-
1.574)
1
(1573
-
1.574
1
(1.691
-
1.692)
U/S
0.25
39.734
-
39.742
-
42.738
-
42.742
1
(1
564
-
1.565)
I
i
(1.682
-
1.683)
,
U/S
0.50
-
;
42.488
-
42.492
1
(1.672
-
1.673)
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