faking ih*s oppc'vn'y A** exrcid olt si^cco e'aii'-de* '0 voo far iclcci^y etc li**le " HOKDA $2 SpOft" a^org a 'srge number of   mopeds in   '*e   weld.
Fc* 'ha late cf ccnclying wilh /Ojr expectation for a gooa osm'ti^i ro cc -y bulQ you wi*^ her o your lovely HOKfDA   £0   Spcri to enjoy a coivorlo^e r;de.
.CofwncAH in this bco^'ci arc subjec1 to change vwiihoul nolic^-
HONDA   MOTOR CO.,   LTD, £5.5, VAESU, CHJO-KU, IOKYO, JAPAN
Contents
features of honda 50 sports    ......
general specification    ............
idemti=icat;on number   ............
routine maintenance   ............
wain points of driving
$ior!>g the   e*^gi"c...............
OpBfofifig ihc cl»ish end geor Ghangiog.
Gecr -chorcing en hlls   ...
Stopp'-g -ord parkhg     ............
?Lri"'pg-in   period    ...............
MAINTENANCE  o»-d ADJUSTMENT
Ad;uS'mc"t   of ignition lining .,,
Adius'tictii   o? valve clearance       .....
Adjusr-ner.t   oF drive   chain lension.....
Adjustment   of clutcn         ...........
Adjustment  ol b-oke..............
Adjustment   o* carbure'ler        ........
Adjus'trc-'   ol   •r-'OHio wire and throttle
yip
10 13 17 18
20
22. 25 26 27
28 30 32 34 38 40 42
Remove! of wheels......
Decarbonizing of muffler... Dusting of oir cleo-.cr Cleanirg cf fje'   si*ai-<='
LUBRICATION
Changing   t-.e   ccn'teicnce.....
Spark   plug rro>leiO',ce ..
TOOLKIT..............
TROUBLE SHOOTING    .....
WIRING DIAGRAM........
43 47 48 4?
50 52
54 55 56 57 58 58 60
62 64
77
A Bird's-eye View of HAMAMATSU PLANT & their own PRODUCTS
L
HONDA   125 (C92I
HONDA   125 SUPER SPORT (CB921
HONDA   125 SPORT {C$92}
A Bird's-eye View of SUZUKA PLANT & their own PRODUCTS
MONDA £0 (CIOOJ
HONDA   50   (CIC-21
Features of HONDA 50 Sports
MODEL ClIO
{¥) Complete electric cq-ipircnt,   including   c regional indicator   lights opera'ion.
Sporly and attractive style which ever appeared in the world. Up-swept mufPcr ICI10) or conventional muMer iCIll and CI U) whichever yog like. Attractive. sporty style.     Available wilh up-swept*
cio;
MODEL CI 11
® 4-cycle engine.    No rcix'cg o! gas and ci1.
i    Models C110 and CI 14 come eqj'ppcd with y   manual   cL'ch.    Model   C an outotralic c'v'ch.
(§   Light in weigh! j   eas/   to handle and pari:.
'i>: Ughl allay heed redness danger c' over-healing.
7    -'- c: cious Selectmen cf gear   ratios 'or o I around use-
:H   Drive chain is completely encased, which adds groolly to its    \U
II  bas
CiO
•f.:*
MODEL CI 10
MODEL Engine	C110	CI 11	C114
	SOcc	SOcc	50cc
Clutch Muffler i	Hand	Auto mo He	Hand
	Up-Swopi ,    —.—	low-Swept	Low-Swepf
MODEL C11 1
? ENGINE
Engine :
Bore X Stroke: Cylinder capacity s Compression ratio Ma« muni   power: Max mum  ici   phl
Ci«
For  registration   or   report   cf   " Honda   50   Spor* ",   serial
numbers cf Ihe Engine and Frame ore indispensable.
These   rjmbers   are   marked   on  the  crank case cover and
lefl hand side cf l^o frore os illustrated in the  ar;ograms hereunder,
Fia, i
Engrr* NO
F*o.   2
ci?:
Routine Maintenance
T Do the tall light, wisher l*gM aid stop light
lunctlci ? a   Does tfe Iront brake actuate well with tree play ot 0.8 in.-1.2 In*?
(!) Do the t-ead ligM aid winker light actuate
perfectly? i; Cces the fuel tank contain enough petrol? ® Does the horn sound satisfactorily? (*) Is the crank case containing clean oil properly ? H) Does the clutcb fuccticn well I J) Dees tbe rear brake actuate well with free pla)
of 1.2 In.- 1.8 i>. 1 © Is th* tire pressure adequate?
(frost 22 lbs., rear 28 lbs.)
All the Items marked  • should he  carried out ty your appointed deader with the htwM oMhe
Items mentioned hereunder are the daily inspection anfl should be checked t>y yourself before start youi daily riding ot the HONDA 50 Sport and nake it a habit not to forget. A slight nejlieience of these items may e'leet to harn your cornfcrlafcle driving and even chase you to give up riding further.
®   ©
Routine Maintenance
the rark ® is at yaur option in dcing by yourself,   (not necessarily to be done at the dealer;
						routine maintenance to bt or purchased doaler tho servicing work, ^5*   ijB             r 1    T"*^
•J 31 3 o ®	CO 3 o	D	ro CL 3 D 3 5	o	This table is ihe program of the bo   done   at your service deal who are authorized to perform Check and    or rraintain battery	
	•	®	•	®		
	®		®		Ql&on fuel strainer	
•	•	•	•		Adjust valve lappets	
					Chock and    or adjust ignition liming	
®	®	®	®		Grease all nipples	
®	®	®	®	®	Adust and lubricqte drive chain	
•		•			Check lightness oF main bolls & nuts	
	•				Clean carburetor	\
®	®	®	®		Dust air-clear.cr	\\
		®			Decarbonize muffler	V\Yrik—
®			®		Ad;ujt brakes ar.d clutch	\-SWffl|p^
®|®		®	®	®	Ruplcce Engine oil	IPvJ
• 1		•		• 1	Relighten wheel spokes	
Gist of Driving
? HOW TO  START ENGINE
1.    Turn rhe gasoline cock   to "On"  posHon.
2.    Shui off completely the  choke shutter.
3.    Insert   the key  into main switch and turn  lo the  position I
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¦nwi
Fig, 3
FiQ, 4
e^BiNAii^ swircH ta
fig,  J
ItiMULC GBI
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f  .:.  6
4.    Open up the throttle grip approximately   |/4   ro   1/2 of fuel opening and fcic< down ihe kick starter.
5.    Then   Ihe   engine   starts running.     Leave the  choke   shutter  fever   shul and worn up the  engine by medium speed.
6.    When   he   erg'rie   warmed   up   and   the   gas deeded as getting  richj then open up the choke shutter by pushing   the   lever   down   lopen}.
(Note)    When the engine is already wormed up or in the high tenperature. rhen stip o^er item 2 and ihe engine  should start very easily.
(21:
? HOW TO START RUNNING   AND CHANGING GEARS    .
1.    Pull the clutch lever and shift the gear by lifting or depressing tho toe part  o of the foot opera'ed change  arm.     I Fig- 7)
2.    Then turrt the throttle grip hwerd slowly and increase fhe revolution of Ihe engine, while disengaging the du'ch levor easily (CIOO & CI 14). Lifting the pedal, point a, 1o home easily o^d release the peM Then gradually increase the engine revolution for the lake off,   (C111)
3.    Tak'ng off with the low gear, increose the speed up to the rospeclivc amount   then   return   the   throttle   grip,  pull  the clutch lever for  CI 10
(this operation should be omitted for CMl) and slep in a of the change arm. Increase of the speed can be obtained step by step up to Ihe top gear accordingly to the load and road condition following the same procedure.
C22]
4.   Changing arm has double pedal which   can   be   operaled   by   toe   or heel, and  Ihe changing order  is as follows;
tiftirg or d6pftss*^g by foo IPc'it o c< b?
Law		Nutral		Second		Third	!«—r 10°	Top
	------# 5°		------*		------*			
					10°			
		Lifting by fc* Mow of						
		Deprti	$i*g  fcy  1	oo (Point a	i —>			
When you  press down the change arm by your foot to change speed, be sure to  press down until you feel a  response, 5.   It should be gotten into your habit to change gear with respective speed as meniioned hereunder, otherwise   unnecessary   over   revolution   may harm  to engine.
Geor	—(Low)    ¦	•—ISeeond)—¦	—(Thirdl—	—ITopI—
Speed  Ikm/hl 1 0            10 (mile)                   (6.21		15         20 19.31    112.4)	25         30 (15.51    118.61	3S          40 (217:   124.81
[-.23.
[2*1
6. In the event of speed being reduced, change down the gears as qu'ck*/ os possible so that  the vehicle does noT  lose inertia.
7t Induction oi ihe gear in necral is node by red I gnt oi the neulrar lamp which is located on the right side of the lop of ihe headlight, so be sure tc check whether it is on while the change is in neutral (Fig. 8)
Fia £
? DRIVING  UP Hill
When   go^g   up   sleep   slope   or   go^g  up hill with a   'oad on  the pillion, engage in second or low gear as circumstances required.
? DRIVING  DOWN  HIIL
1.    When   going   down   hill   close   the  throttle,  release the clutch Isetiing in neul'all and gen*ly app'y  ihc  front and  rear brakes.
2.    When a fvll is very steep, use engine brakes, that is Ihe method of descending a s'opc with throttle closed and     Clpse  the goso!ine   cock,
l7\    Takft out the combination
sw tch  -f'/-
(3
App y Ihe Anti-lhefl
;or the handle.     iFig. 9*
STEERING MftDLE LOCK
fig   9

? RUNNING-IN  PERIOD
Althojgh the ruiMing-in process has been subjecred at the factory, i? is recommended thai ihe mach'ne shojld be haracd ccreftly avoiding unduly stressed 0? speed bjrst up lo 500 ri!es after started r'ding. During ihis period throttle control must be regula'ed not in excess of 3C mph  148 km/hrl (top gearl by the  reading of speedoreler,
After  the period, work tp gradually to the maximum speed,
Whether it is within the running-in period or not, it is needless to menrion that the caution ^usl be taken nol to stress the engine until the lubricant seemed to be circulated to every section,
C»7]
Maintenance and Adjustmen
? ADJUSTMENT OF IGNITION TIMING
1. Take off Ihe point cover a and check f il is adjusltfd so that the pohl will slort lo open at the instance when Ihe mark b coincide with  Ihe " F " mark on Ihe  fly wheel.     (Fig,  10)
ha. 10
F.g.   H
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2.    Adjust   \he max. eonfacl point gap to 0.014" 10,35 mm) with  g driver alter  loosened the screw c.
3.    Loosen the screw which  retains   the   conlact   breaker   and   ad.usl   the timing  by moving bose p!ole so that  the contoct   points   ope^n   ot   5°
,*      before  top dead center  Ixarl; " F "I.
(Note)
1.    Fighter  the screws afte^ adjusted and recheck fh© timing for correctness.
2.    Dean  or refaco  the  corfocl  surface w?th   ra^   or   oilstone   whenever it is found d'rl or pitted.
[291
? ADJUSTMENT OF VALVE CLEARANCE
L Remove Ihe point cover q ond set the "T"' mor< ol ihe fly wheel so Ilia* ?o meet with  Ihe mork  b.    (Fig.   121
2. Take out ihe tappet hole cap and check ihe exis'ence cf ihe gap ol the vo've by noving the end ol the rotker nrm up and down. iFig. 13! If there Is no gap on the vclvc rake one ccniple'e turn ond adjus' it so fhal the valve is in closed condition llr o*he' word, to set the valve a*  the upper dead poin*)4

.
;,]  12
Fig. 13
:jod
Fia
3. Loosen the iul c ond adjjsl the gap with tJio screw d so lhai tho filler gouge 0.002" 10.05 mm] can easily be inserted end no renolncer gap is fell.
Tho    tappet    clooronco   should   be   sorr^   fof   hoth inlet and exhausl when the engine  is :o!d.
When you tigh'en ihe lock nut, by corelul no! to alrer the   gap   and rerheck shcJd be  reccmmcndec gfler a few ruth of Ih© crank shalt,
£313
k ADJUSTMENT OF DRIVE CHAIN TENSION
1.    ftc^ouc   ihc  pocphc'e  cover a  cf *Hc chain  case*     fHg.   15)
2,    Move the C^oin wilh a  linger up and down   end   cnecV   the   irci*'~jr
rolcl deftecioi.    If tho deflection is fourd in  excess  Ihon  0*4    0.8 O0^20mnl  odjus' i* os following.
C32J
3,    Looser t>cth axle nut o ond reor axle sleeve nut b and cdjust with !^e both side nuts c to cbvj t ">g correct deflocl:Cri, In this event, care should be called sc thai the Tar* of the cKin adjusts Iboth righl aid left) lecole so^e gradient of nolches on the both side of reor   Iprk.
4.    Periodica! / labout 5000 mile remove and clean the chain thoroughly with gascl:ne ond lubricole with chain greose. Oil fhe chfl'i mors offen usiny  oil  con fron the peep hole,
C33;
? ADJUSTMENT  OF CLUTCH
MODEL C110 &  CI 14
]t     ^ho   c Jith   level   thaulKj hflVfl  iomo Iree ptfry  *-r-   0.6"  to   I     whefl inoasjfcvl at  lh(    DIM  tf Ifcfl  tl mi      ftlfi  o'd|(«tlTHS*l ©I  cllTC*)  li lo l:c i.  a ui fa low      Fig,  '7
2.   Ad jiI   Mm   free   r-Isy   wlh    the   adjure*   b   WMv   "'•        :•   Aid  "    I
loosened,     iF-g    Ifil
fg   If                                                             Rj, t«
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3i   AH|u5i   iho  du'ch   BngaQBrrtOrtl   by the adjusting SCf«w d utl-g  M
head driver when itm loci nut c (i Ipoienod Scraw in Ifahad ¦ ¦; «fow d the clolch lonrji lo duong : ic; ng the clutch.
Ihon  od|ust The free play of handlo lover  ol  the adjuster b. A,    To  artiure Iho clutch Operation the llettb hereunder ihoy!d be alleged. Chtfcfc  if   the   onglno slarl   without   any   slip   when   Ihe   Ittfit   podal   I? tapresiod v:yyrobiV
Start Ihe engine and pull Ihe clutch levex ond so© H the rrach*ne jumps off or Ifw rrifjlne cease lo run When ihf'l the change Into lew qpati
Fin moeWtftl should start running TmootMy when releaitftg Ihe dutch ilowl/ and  turn up the rotattcn c(  the  e^g'ne,
-
MODEL CI 1 1
1.    Loosen the bolt a ard - : .eJ l^c screw b w"th d driver. When b is s-crewed in, the clutch s^sjld become hard tc release, ar?d loose*1 the   scre^v,    t   should   ^ec^-n©   IWy   JO   slip.      lF»g.    191
2.    Azc'otch should ro* bs s ippery a^d should 'suitably be released. Therefore, ir  is mosl  essentia"  10 odjus* it   perfectly   os   mevioned    r 1.     The  method  be'ow   eov'd be  recommended o>  Jo  ibe confirmation of  *he odius'irg-
> .5   19
C3^:
a.    When you IcFck the staffer, erg ne stems running without any slip, :,., The clutch shou'd bo considered as not being !   ppery,
b.    When you ser the charge in the second position ol'cr storing the engine, ihe vehicle docs nor move off ond the cftyinc docs not cease running, or Ihe vehie'e does not srarl of when you press down the honge arm further for 10° frcm *he original pOSi'ior and open ihe throttle gnp, , , The dutch should be released allrial.f,
t, In the event Ihol the engirt should cease running when you removed a foot Ircm ih*? chongo pedal with *he change shift in the second position and Opened  the  throttle 9fip   to   increase   the   revolution
with   the   condition   of   the   brcue  applied.....The djtch should
no*   be s!ippery\
12?)
? ADJUSTMENT OF  BRAKE
I. Adjust the free play of the broke lever to be 079" {20 mnl lo 1,18* (30 mml. In o^her word, ihe distance between Ihe nnloral position o and   the position  b where  the  orating should start to effect.
(Front  brake,.,  Fig. 2CI          iReor brake..- Fig. 22)
na 2C
Frcrt   brok
no. 2)
i
'38]
2.   The adjusting should bo done with ihe nul c.
(From  brake...  Fig. 2!l          'Rear brafce... Fig. 23)
TigHlcn  the  nul e ard ihe free ploy should decrease.
Loosen me nul c and the  tree  010/ should increase.
19. 22
Rear  brake

[39]
? ADJUSTMENT OF CARBURETOR
1.    Screw  in  l*e  at  screw a fo home ldon't  rtghO, and then torn bock 1 /-j  ?i>rn (anri-clockwls-el.
2.    Adjust   the running speed  to  minVur, obtainable revolution 11500 RPM) &y the  throltle  stop screw b gently.
3.    :ir.d a  position of screw a  where Ihe  dng ne speed   rises   by   fuming the screw o in ei'her  direction within  }j  tu^n further
4.    When fhe speed of the erg'ne rises, srOw down to !h» idling spood cgcin by the screw b. Then caribrafe '1*5 engine with the screw a fo find the position where the engine idles steadily. Obtainable idlirg speed should  be  1300- 1500  rpm.
Ma    24
L-  I
5. In cose where the ihroiilo valve is slightly opened from the id'ing speed the erg'ne running should respond snoorhly. If it runs erratically screw h the  Rear   Wheel
ijce Ihe machire on  *:$ ftwin  stard.
2.    Remove  'he S r-rm  ia'ch clip  a,  unscrew nui b end remove the  boll,
torque  link   stopper  bod
3.    Unscrew  Ihe  brake a*m ad|usl  nui  c,     And   depress  the   brake   rod ef drcp d<>wn I rem the brake arn joint.
F;3- 29
Fla 3C
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HONDA MOTOR CO., LTD.