Honda CB77 - Page 6

B. Crank Shaft (Piston , Connecting Rod)
It e m
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Standard
I Repoicing Umi' !
Remarks
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Piston pin & piston
Clearance 0- 0.012 0.05 more In cold, push in
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0- 0.0004
0.00196
softly by fingers
Connecting cod In. dio.
15.016 - 15.043
15.08 more
It e m
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Standard
I R .. l· I
Remarks
I epalflng Imll
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:
Pis ton
Top diameter 53.55 - 53.60 53.5 le ss The progressive
small end
0.5911 - 0.5922 0.5936
Con. rod small
ent) &
Clearance
0.0 16 - 0.049
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0.08 more
piston pin
0.0006 - 0.00 19
0.0031
2.108-2.110 2.106
direction of the
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Max. dio.
+0
lower ports of skirt
,
54_0.02=D
53.9 less
2.112
Con. rod small
end
Swing
3.0 morc
Max. amplitude 10
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0.118
axial direction of
L
ower end of can. rod Axial cl eara nce
0.07 -0.33 0.5 more
cronk pin
0.0027 -0 .012
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0.0196
Diagonal clearance
0.006 -0.016
0.05 mOre
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Out of r ound D-10. 14-
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0. 16 1=d
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D-IO.005 -
0.0061=d
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Piston & cylinder
Min.
clearan ce
0 0.1 more
Big
end · small
end of Amount of
parallel
within 0.02
over 0.1
A, leng,h of
can. rod
0.00078
0.0039
100
mm 13.93 inl
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0.0039
,
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./
Pist on pin
Dia.
15.0 -15.0006
15.05 more
!
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0.59 - 0.5907 0.5925
Distortion
within 0.02
ove r 0.1
At length of
0.00078
0.
0039
100 mm 13.93 inl
Piston over
size
Over
size
0.25
3
category of
0.0098
0.25 1000981
Taper
D -0.08d-0.08
ove r size
Boronser weight
Out. dio.
24.99-25.00
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24.95 or Ie"
crankpin
0.9838 -0.9 842
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0.9822
R. L. cr ank shaft
Dio.
of shaft
30.82-30.86
30.6 or less
1.213-1.215 1.204
Cronk shoft bearing
Axial clearance
0.005
Over 0 .1
Cen ter bearing
0.00019
0.0039
D-0.0031
d-0.003
Top · 2nd ri ng
Thickness
2.4 -2.6
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2.3 less
0.094 -0.1 02
0.0905
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Width
1.780-1.795
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1.7 less
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0. 0700-0.0778
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0.0669
Tension
0.75-1.05kg !topl
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0.6 kg le ss
Tangential tension
Radial
clearance
0.014 - 0.016
Over 0.05
0.0005 -0. 0006
0.0019
Crank shaft
Max. swing
0.03 less over 0 1
In case of supporting
combina tion
,
center bea ring. th e
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0.0011
0.0039
Cam chain
Overall length
723.0 -72 3.8
Ove r 728
swing of both ends
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0.70- 1.00kg 12ndl
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1.653 - 2.315 Ib 1.3230 less
In case of binding
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1.543-2.205 Ib I
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End gop
0.15 - 0.35
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0.8 more
,
28.46-28.49
28.66
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0.0059 - 0.0 137
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0.314
Top· 2nd ring & ring
Clearan ce
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0.01-0.04
0.1 more
groove
0.0003- 0.000 15 I
0.0039
C. Cam· Timing and Valve Mechanism
Oil ri ng
Thickness
2.4-2.6
2.0 less
0.0944 - 0.1 023
0.0787
Width
2.780
- 2.795
2.7 less
tIe m
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Standard
I Repoicing limi' I
Remarks
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0.1094-0.1100
0.10629
Tension
0.7 - 0 .9 kg 0.5 less
Tangential tensi on
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1.5435 -1.9 845 Ib 1.I025 1b
Ex.
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In. valve guide
In. dia.
7.0 -7 .01
over 7.05
0.2755- 0.2759
0.2775
Ex. valve Overall length
,
88.65 - 88.85
88.2 or less
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End gop
0.1-0.3
0.8 more
In case of binding
0.0039 - 0.0118
0
.031 4
3.490 - 3.498
3.472
Out. dio. of
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6.97 - 6.98
stem
6.95 or less
Oil ring & ring groove
Clearan ce
0.01-0.04 0.1
more
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,
0.2744- 0.2748
,
0.273
0.0003 - 000 15 00039
Thickness of head
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1. 0
0.5 or less
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Piston over size
Ove r size
0.25
3
ca t egory of
0.03937
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0.001968
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0.0098
0.25
10 .00981
Piston pin Out. dio.
14.994-15.0 14.95 less
over size
0.5903 - 0.5905 0.5885
T otal length
45.5-45.7
1.7913-1.7992
In. valve
Overall length
89.18- 89.38
88.7 or less
3.511 - 3.5 18
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3.492
Out. d io. of stem
6.97 -6 .98
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6.95 or less
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0.2744 - 0.2748
0.273
3
2