Honda C70 Manual

							 
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HONDA

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re»
 urn
 F

UE
 L
SYSTEM

Flllil.
 TANK

Turn
 ti-is
fuel
 valve
 to
HES.

Loosen
 the
firain
 5t:r|-.w
 uni-l
rirmn
 the
fuel
 thu-r|;|uqh-

ll,-.

R-:mr.w-=1
 the
rioht
 title
cover
 and
the
il3l|lH",'.

D-.5130:".t‘iEttt’l
 the
iuel
 i-|1r::
 iiti-rn
 the
Fuel
 t_a,r,l-;_

Du
 rsrrr
 -irillrm
 _fIs'm¢';
 rrr
.-'ajl'lIIl"il'4i'—f!i:t:4i'ii-'
 ,pr.tr.ri'i'm'

ltiipr
 up
spilicdeesolrnr
 or
I-'fl"CI'.

Remove
 the
s-eat_

Flrmmie
 the
terew
 and
hnlt
 tewrinq]
 the
fuel
 link.

rheii
 rente-.re
 the
lusi
 Téltiit.

Ir-.5.ta||
 ihe
Fug;
 tinl-q
 rn
111-e
 i'|':\|fl|':il’:
 DH]-El’
:31‘
removal.

|'t-‘loin!
 sure
Them:
 ore
|'||.1
Tu|:i
 leaks.

i3-r:-eel:
 the
uent
 noiei
 of
the
 tilier
 can
ifl-I
lJl!fltl'-BI;|&-
 FUEL

I
Thi-

SEAT

_

SCHEW
 ‘Q1’;

Dateo-f
 Issue:
M-:n,-',
1':'-MD

EHUMDA
 MCITDH
'CE'J.,
LTD.
 4-9  
						

							 
1-Ioeena.

ENGINE
 eEMovn|_.'|nstni.|_At|on
 C10
$1/i
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2.5-3.5
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IEIHUHDA
 MOTOR
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LTD.
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 INFORMATION
 5-1

seems
 nemowu.
 5-1‘

ENGINE
 INSTALLATION
 5-4

SEIWIIIE
 ii'iFi]|i|||lT|l||l

GENERAL
 iNSTRUC.TlDl~i

The
 following
 pa-rt;
or
component:
 oil-i1
be
!iEt'\'iE1!t1
 WI-II1
T.i'tB
Bl'l§ifl8
 initeiiltl
 iI'l
THE
 Tt-‘It'I‘lE-

I
 Ctutch

I
 Gearshift
 linkage

I
 Di-ipomp

I
 Cviinderhceci

SPECIFICATIONS
 Engine
 tlr-|r
wright

Dil
 eapecit-,r

TUFIGUE
 VALUES

Engine
 hsnqtw
IJDIT5

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 stsnti
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 I

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 I
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 Pieto-n

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 .¢i.¢.gIrnHatnt

I
 Starter
 motor

1B
 kg
i39.?
 lit]

I11‘
 lit
i{|J,?4
 LIE
qt,
0.52
 Imp
qt]
et
en|;|ins
 sesemtiy

0.5
 lit
(0.55
 U5
qt,
 0.53
 Imp
qti
at
chine:

2.5
 -3.5
 lug-m
he
-
2!-1'1-lbi

2.0
 -15
 leg-rn
I14
--19.1:-Iui

‘Dots
 of
iesue:
 Mai-,ll=1filJ

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 5‘

5-1

_   
						

							 
ENGINE

FIEMDVALHNSTALLATIDN
 [flu
.-.

HONDA

fleet.

ENGINE
 REiili]Wti.
 me
ct

Drttin
 the
nnoinn
 oil.

Heme-tie
 the
tlir
oi1te'1’1n-r
 etwet
err-t1
Irnrtt
 cmler
 bend,

Flemotw
 the
front
 cover.

LDDIGI1
 the
ettheust
 pipe
letting
 nuts

Ftentoue
 the
muffler
 mounting
 |'|u1.l
and
remote.-e
 tite

muffler
 assembler-

Dieoonneot
 the
starter
 cable.

Sui:-port
 the
tent:-|1.:-tale
 up-right
with
a
I‘iIBI‘ll2i.

Remove
 the
footpegs.-‘tide
 ttenti
sssembiy.

Linhoolt
 the
brake
 pedal
return
 firing
from
rhe

engine
 hanger
 butt.
 MOUNTING

Mute

FIETUHH
 SPRING
 '-;.;*@‘*:

_I
'1}

PI
 _.—e

Frtortt
 covet:
 ___

STAHTEH
 CABLE

ASSEMBL
 NUTS

1

STAND
 _

7___._r.
 52

52
 Detu

of
isms:
 Mere,
1980

'9
 HDHDA
 HDTCIH
CCL,
LTD.
 |""""\

.1--.  
						

							 
Fl

HONDA

J
 ENGINE
FIEMDVALJIHSTALLATEDN

;"_‘
 Hen-nva
the
hhh
 terrsiun
 win:
"mm
 l|'|E
fipflrh
 Dluq

and
 clamp.

D]5{:|r||1E|;'[
 thn
|I"il'aH'.I:
 plpu
|rn|‘I'I
 IHE
:r\l_]|flE.

/_‘

F“
 F“

Rama-'|'!
 qm
mg-t1,~|:r
 pin
and
 |D'U'l'BI'l
 HM!
Elli!
 E-l'|d

slwvl-11!-Ill

l_g.3¢5_5|'|
 {ha
|;|ri\1l'
 Ch-li|'l
 .ir.||uiI|flQ
 RIG.

Ham-we
 the
iaft
 aid!
 1:01'wr_
 nngirll
 mrodkti
 C-flvflr

and
 Iuwar
 chain
case.

If-\.

|||F"~.

fa"
 ..

Hflmmln
 ihe
rn-aster
 link
¥EE3lf‘llTlfl
 rim
ind
\‘"*'=|!-IBF

link
 31
fhi
 drluc
 :p1l2|G|iB11.

_.-1""

.-F

|

1""
 IN

ii.’-.

w='*.-6‘
 H

I

--nu

HIGH

AXLE
 HUT
 SLEEVE
 NUT

q-

LUWEFI
 CHAIN
 CUTTER
 PIN

CASE

J-_

LINIC

HETJHHIHG
 CLIP

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i.

.-av

-
 H

ugh‘

I-

'|'I.|l|1E

UT

_
 -.

-1'
 '
 -

>;.—*-*1
 .9

Date
 of
léiuar
 May,
193-CI

QHUHDA
 MOTOR
CCL.
LTD.
 55

_

5-3  
						

							 
HONDA

F

ENGINE
 HEMDVALIINSTALLATIDH
 [:'].|‘]
'\%j'
.-.

|J'i5DlJI1l'1-BCt
 'lhE
FLC.
 gE|'1E'r.llu|'
 nuuplur

Hlrflm-‘I:
 1hr:
hl'Bi'|L‘hEl'
 hose
frum
 Th:
faupnritflf
 and

clump».

Rerncml
 1hr:
two
 sngirne
 hangar
 bnlu
and
mmm-4;
 the

englnu.
 RC.

GENERATOR

THEE
 HOSE

ENGINE
 Fl
BDLTS

ENGINE
 IHSTALLETIUN

IMI-Bll
 Thu
Ehglfil:
 |1\
lh-0
 r-wars:
 order
0!
remove-I.

NDTE
 @
""1

"fl-'hBl1
 |l'|1bI1lln|1
 thl!
dfiuu
 chnlrl
 rnastlr
 iink,

main:
 sum
1-hat
the
retaining
 clip
open
 and

Faces
 um
npnmltn
 uirucninn
 of
nurmal
 chain

rmnlin-n.

|
 *
Huute
 the
wire:
 and
cabin
 prpperly
 ljpggg
1-B1

'
 '
Flll
 the
crankcase
 to
ma
 pm-pur
 leual
-with
 tha

fanom
 rwandad
 oil
{page
 2-2'].

'
 Miiusf
 thrr
Izlriw
 ch-afn
 tension
 luaqu
3-1'
1
I.
 FTFFAINING

CLIP

D
 I
Fl
 ECTICI
 ND
F
 Fl
DTATIEI-M

TOHCIUE
 VA
LUE5:

Fllfliilllllflldi
 Itifid
lnnmhhr:
 "h"

2.0--2.5
 in-m
I1-4-18
 ft-lhi

Engine
 hangs
hdu:

2.5-3.5
 lug-m
lI1B—25
 H-lb!

15-
3.5
'kg~rr1

"B-25
 H-|bI

5-4
 5‘
Datuoflsuua:

h'lau.19BD

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LTD  
						

							 
HONDA

CYLINDER
 HEADNALVE
 C70
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€l
 §
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fi
 4!-E’-2%’
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 kg-m

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1
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E-0
 5“
Data

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Issue:
 May.
1930

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BJIYLINIJER
 HEI-ID
VIII.\IE

SERVICE
 INFDHIIIIATIDN

TRUUBLESHCIDTING

CYLINIJEFI
 HEAD
REMOVAL

CYLINDER
 HEAD
DISASSEMBLY

VALVE
 GUIDE
REPLACEMENT

SEIIIIIIIE
 IIIFIIIIIIRTIIIII

GENERAL
 INSTRUCTIONS

I
 TI1-'|
 =0w:1Iun
 CIJ\'l?|'i
rnainlcnancn
 and
In':r-rumlun
 uf1hr
0'|'IIn|:Iur
 head,
values,
 I:-in\:l1:|1‘t
 il1l'I
mcknr
 lI'lT1i.
Them
 ilrrvicu-i
 can
I10

dune
 wilih
the
engine
 ins1aIIO|:I.
 S-1

B-2

H?

B--4

B--9
 RE

FACING

VALVE

SEAT
INSF
ECTIDNI

E-111]

CYLINDER
 HEAD
ASSEMBLY
 E--11

C"|"I.!NDEFl
 HEAD
INSTALLATION
 B-13

i
 Clmihuft
 m1rI
r0-01-wr
 arm
Iuhriclrlrrg
 0iI
is
fwd
 thrnuqh
 0II
passages.
 B0
mm
 tho
I‘-Ii55i.1§lll
 an:
nut
 |:I0g'gnrI.

I
 During
 as00n1bI\I,
 appiy
Inn-IyI;u:I0|1um
 dlsulflda
grease
'.-0
rha
 carmhafi
 baarlnm
:0
prurvlde
 InItiaI1ul.1rI|:arI0n.

TCICI
 LS

5|1¢:0inI
 Cnmmun

'u'0II.rE
 Guide
 FIE&l'|'h!f
 Q1554-UBBDIIIU
 '|.||';1]yg
fluid;
 |:|5mm.E.,_
 55
mm
 fl.;;,u,umfl-mum
 m942_32Bfl.|m

WW
 Bu‘-'10
 Brim
 0:002-1100100
 Wvv
E-W00
 5*-I'"lIJFE5|=0-r
 00:01-0010000
0|
01051-0200001

TDFIUIJE
 VALUES

CI.rIInd0r
 hnad

'E‘é1I'|‘|
 -CI'I|1|.r|
 :'prn|:Ic|:l

SPECI
 FICATIUNS
 I13

-1.2
kg-m
 I?
E
ft-lb}

‘I15
 —
I15
 IHH11
 I4
—
T
F1-'|hI

Cnmpressln-n
 pressure
 _¥.'.'.'IIII‘f'I?i°‘_II.'?_

_
..5'EH."""3E
 LIMIT.
_

10.0
 +
0.0
 |¢g.r=m=
 ms
I
1
pm
 A

26.1]?
 mm
'l1:I;1_2lE|_|nI

25.59
mm
I'I.CI'I
 In_I

Cami"-:|1'1
 Cam
h-eiqm
 K
IN.

EX]
 £6.-1"‘
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_._..___‘E§i_7-iB'%‘e":'1r11
 'II';.5.I.Ti"1

Dil
 |:I-earlnc-e

IEII-dc
 :1I:I|'|-nm

R-:x:I=0r
 arm
shaft
 0.1].

R0-cker
 arm
LEI.

"-"aI'.rn
 spring
 Free
Iangth
 Inner
£1,010

—
0.1125
 mm
IIIUDM
 —
IJIIIJID
 In)

CLUE
rnrn
 [D.I'.'.IIJ1'
 In)

"_
 0.004
 -
0.035-hm
 10.0002
-
5.0014101

0010-
 0.000
mm
10.3020
 -
0.3-00:2
 am
0.01155
 r0'.§0Fir-0

10.000—10.010mq110.aa:r-0.30431:-I
 __

15.1
 mm
 I'D.
In]

I
 Dr-I'n|r

Praluadllennlh
 lnmrr

[I-IJIIE-'|'
 118.1

mm
 I1.1T
in]

_
 i 

2.45
 —
2.75
 1952.?
 mm

I511-B1
 —__G.DE3
 Ihi-'D.B5I
 inI
_

5.55
 —
T.'I'5
 IIiQ."2-FI.EI
 mm

II-'1-.551
 -
IT
 DEG
 I:IJs."U.SB
 ir|I
 10.10

mm
 Iriaéa
 InI__

1's1..r*.-..~

25.9
 mm
 I1.DB|nI
[DB4

|nI

2.3
 k§."2?.?
 mrn

I5.D'|"
 I-I:5_|'EI.B-Q
 |n:|

EL3
 k;|.'2-1.9mm

(13.53
 lb0"IJ.EI8inI

Valvu
 maids!
 'l."aII.ra
stam
 IN.

u-mu
 D.D.
 Ex
5.-I155

—
5.1155
 mm
10.1145
 —
41.21152
 in)

5135-
 5.145
mm
ID.2‘IAIII
 —
'Il2'1-'1--I
 In]
E.-\1=DC|

mm
Ifl.1"l2B
 In||

5.1100
 mm
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 m.

Ex.

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Srnrn-In-guide
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BL
 5.400

5.-100
rmn
10.2150
 -
0.2150
 an:

5175-
 5-‘I435
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0010
 -
0000
 mm

“E59
 "i15_'P_""'L_I"-"'l13.;‘!.I.I.'?EI.'.'3I

I
 '\-"aI'.r0
 seat
wldth

Cylinder
 head
Wtrppgt
 1-0

rnrn
 ID.EI-II
InI

-A
 .
 -
 0.500

mm
10.210510}

5!-'.5F1'9!"_’.'1
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 mrn
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_

I110
 mm
 ICLIJU4
 inl

_
 I.El
 mm
 IIIl.'l1E|
in)

ELD5
 mm
 IIII.II|l12-in]

Dana
 0|
Is.-sue:
 May,
IEIBIIZI

IIEIHCIHIJA
 MDTDFI
I‘.'2C1._
LTD.
 51'

'

6-1  
						

							 
HONDA

CYLINDER
 HEADNALVE
 CTII

I
 i
_
 —l
1-

TIIIIIIBIISI-IIIIITIIIE
 P0
 rforrnence
 nrc
IJI-ems
 related
 In
the
 cylinder
 head
can
l.l:Ll.tlII'|r
 he
diuanaeed
 by
n
|:t.'|l'I‘|I‘Jl'£:e:Ir.N'|
 tie-.1,
nr
nnice
 |'Jrul:|In-rn-i
 which

can
 he
traced
 to
the
 1:0-p
end
 with
 a
saundlng
 red
er
i‘I1EfI'||:|»:-¢m'.I|:,

Law
 Camnretsicn
 Celrmnrusiun
too
I-Hgh

1.
 Valve:
 1.
Excessive
 carbon
bt.|IId-up
 an
pluten
 head
er
uflrltbusliurl

—
 Incorrect
 valve
adiustrnent
 r:I'1.eml:-er

—
 Burned
 or
cent
 uflI‘|'£:
 Eula“.
"DI"

_
 gt:-.|;rl'l-:I?I
 Tulve
liilming
 1'
ltmtkmcr
 w|_“__’diuumEm

B
 I1

_
 _
no
 En
V
W
 Em
 u
 2.
Sticking
 valve
or
bra-Itun
 valve
sprint]
2‘
 Clflgndur
 "Md
 3.
Damaged
 0r
warn
 camlh-aft

_
 'lIL;.aaInn|]
 cnr
damagsd
 head
qaattet
 4_
Linn
 Dr
“mm
 cam
chain

_
 amid
 Dr
“ache
 ':""H“d'T
 ‘mm
 5.
Warn
 er
damaged
 cert!
chain
 tanelc-ner

3.
 C1-'
Iihdflr
 and
piston
 {Refer
 to
S-lctinn
 TI
 BI
Wm,“
 mm
zpmckfl
 math

6_
 2
 58
Date
cf
Issue:
 Mrw,
‘I530

IE-'IH'DNEIA
 MIJTDH
CI}.
LTD.
 ‘_-

_,_

;-_

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