Honda CB77 - Crank Shaft, Connecting Rod, Piston

,"
• lie m
Cylind er sleeve
In laying
space
Cylinder Over size
(oversize)
Cylinder head In. dio.
(Cam shaft bearing
part)
Cylinder head In. dio.
( rocker orm pi n)
C ylinder head Comb ustion
(rocker orm pi n) chamber
Cylinder head
!a tt aching face}
capacity
Bend
Cylinde r head Bend
(head cove r attach.
ing facel
Cylinder head
Unl et porn
In. dio.
Carburettor in su lato r Gop of the
i n. dio. of
inlet porI
Cylinde r heod gasket Width
Cylinder pocking
Toch om eter gea r
Tachometer gea r
Tach om~ !er ge ar
"0" ri ng, 14m / m
Tachome ter gear
and bush
Width
In. dio. of
Bush
Out. di r. o f
Bush
Tight nes s
Clearance
Cyli n der head cave r Flalneess
Br eathe r sield plate Thickn ass
Breather sield plote
Cylinder head cove r
Cylinder he ad cop
Cylinder head cap
" 0" rin g
Attaching
dire ction
Tighting
torq ue
Tighti ng
torque
Dio.
I
Standard
0.02-0.05
0.00078- 0.001%
0.25
0.0098
41.994-42.01
1.653 -1 .654
17 . 0-17.018
0.669 - 0.670
29.3 - 29.7 cc
0.03 less
0.001
0.03
less
0.001
25.5
1.003
0
.5 less
0.0196
1. 0-1. 1
0.039 - 0.043
0.3-0.4
0.0118-0.0157
7.0-7.015
0.275 - 0.276
13.982-14.0
0.550-0.551
0 .4
0.015
0.028 - 0.043
0.00 I - 0.00 I
0.03
less
0.001
1.0
0.0393
put forward
an arr ow
Boring
42 .06 more Ex change
1.655
17.05 more Exc hange
0.671
0.06 more
0.002
0.06 more
0.002
1.0 mo re
0.039
7.2 more
0.283
0.2 more
0. 0078
0.0 6 more
0.002
1.9m-kg less
13.73 ft l e b
Rectify
Rectify
Rectify
Exchange
Exc hang e
Rectify
Rectify
1.9- 2.3 m -k g
13 .73 -16 .6 2 ft/ eb
0.45 m- kg
0.35m-kg less
Re ctify
3 .2 5 ft l e b
3.2
0.125
2~35 flt~s~ b II
0.0984
Ex change
20
Remarks
Be pressed in at
the normal tern·
pe rature
3 c at ego ry of 0.25
!Referenlial value}
When I~hling
When tighting
Unless o mi s!.ion,
t here are no
troubles
Unless omission,
th ere are no
troubles
Be ca reful of the
mark
8 spots
are equal
B. Crank Shaft, Connecting Rod, Piston
I t e m
Standard
Repa iring limit Adjusting Poin t Rema rks
Cron k sha ft camp.
Crank angle
180
0
" BI
Crank angle
360
0
I II BI
Sprocket, center
Tooth
16
cronk shaft
Bottom
dia.
36.285 - 36.286
1.428
- 1.428
Gear , center crank
No. of tooth
22
shaft sprocket
Thick
ness of
15.295 -1 5.337
15.1 less
Ex ch an ge
No. of crossover
crossover
teeth
0.602 -0 .603
0.594
teeth 3
Oul.
dia.
47 .9 -48.0 47.7 less
Exchange
1. 885 - 1.889
1.877
Out.
dia.
38.003 - 38.0 15
38.05 more
Exchange
1.496 - 1.496
1.498
Radial
0.006 - 0.0 14
0.05 more Ex change
clea ran ce
Center cronk wei ght Oul.
dia.
of 25.991-25 .999 25.95 less
Ex change
pi n
1.023 - 1.023
1.021
. .'
Cent er
cronk
shaft,
In. dia .
25 .0 -2 5.02
0.0040 I
{Re fer en tial
value!
pressed port 0.984 - 0.985
R. crank shafl, In. dia.
25.907 - 25. 291
bearing port
1. 019-0.995
R. crank shaft Oul.
dio.
29.983-29.993
29.95 less
Exchange
bearing part
1.1 80-1.180
1.179
Crank shaft camp. Max. swing
0.03 less
0.1 mo re Rectify
0.001
0.003
R,
Cro nk
shoft key Width
4 .0 - 4.03
4.10 more
Re ctify
or
groove 0.157-0.158
0.161
exchange
Thick
ness 4.0 -4.1 (Referential
value!
0.157-0. 161
Length
be
processed {Referential valuel
with one c ulle r
l. cronk shaft pin,
In . dia.
25.907 - 25.921
pressed
po
rt
1. 019 - 1.020
l. cro nk shaft
O u
t. dia.
30002 - 30 .0 15 25.95 less
Excha nge
pre ssed
port
1.1 81 - 1. 187 1. 021
*
30.004 - 30.009
•
29.97 less
1.1 81 - 1.181
1.179
Primary drive sprocket
No. of tooth
15
Measuring
39.1 1-39.21
38.9 less Exchange
bo ttom
dia.
1.539 - 1.543 1.531
2 1