Honda C70 Manual
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l;""" . ‘.-" |,..-. |.i"""\. 1"" I-"_"~ K-P.-. F (W. F“ [I THDUBLESHDDTING EIIEIIIE LMIIIS Pl]'IIElI 1_ Halter '.ryI'tr:¢,rI5 r.rH gt|.rur'ir.I H spin WHEELS SPIN FREEL"i" 2, Check tire pressure TORMAL PRESSURE 3, Rapidly accelerate from low no tr:-con-rl ACi.'!EI.EFIATES I it, Rev up gr-eduelly ENGINE SPEED INCREASES 5 Chuck ignition timing CORRECT TIMING E, Chectt yeiye clearance CORRECT VALVE CLEARANCE ‘I’ T‘. Test cylinder compression no RIIIAL cow-neserort I B, Ohecit carburetor for clogging CA RSIJ R ETO R NOT TLOGG ED 5, Fierrrrwe sperrtr. plug PLLIG HUT FDULED Tin III-ISCOLOHED POSSIB LE CAUSE WHEELS DO NOT SPIN __ __e- II] FREELY III I3I INCORRECT TIRE F'RESSLIREi'- [III III DOES NOT ACCELERATE WITH -—e- III ENGINE SPEED RAISED IEI ENGINE FEED DOES NOTA1-III INCREASE IE] rzti I-ti IBI INDIIJFIFIECT tir.t:rioA- III rti INCORRECT VALVEO III CLEARANCE III’ LOSS OF COMFRESSIONih I‘-II III I5] I-ti C-ARBURETOR -CLOGGED PLUG FOULEO DH orscotoneo III Dragging his-rlrr Faulty wh-eel bearing Osertightened drive chain Puncturecl tire Faulty tire velvrr $II|:’!|pi.i'ifi If!IuII'l- Worn or unrvcn -|‘.Iut1IIi Iltclritih Carburetor dhoite closed Cfiogeecl air ulcan-it Ciogge-ti Iuel line Clogged fuel l.|nIt up breather hole Clogqetl muffler Incorrect ignition timing Ignition malfunction Incorrect yelye cleerenoe Worn value mt \.r"e-Iue ttuclt open Worn cylinder Si piston rings Btown cylinder heed oritlrer lncdsrect yelye timing C-erburenor iets cloqgetl F poled plug Incorrect hcet rirnglt Dll-L9 Date of ltsuc: May, IEHIII 169. -1 B-3 -El HONDA MOTOR CO., LTD. -
TROUBLESHOOTING .-Pi I‘ ‘I- 1-t:r:;E%t:us. Chncir oil layrrl and condition ODRFIECT ENGINE OIL LEVEL Remove cylrnder heed cover and ctr-scit ItJI:rrit*.etit;in SLIFFICIENTLK‘ LLIBFIICATED Check If engine oyerheen. ENGINE DOES NOT TUE RH EAT Rapidly ictnrlerate or run er hich speeds ENGINE OOES NOT KNOCK- Checlt Ignition timing Sr yeiye clearance CORRECT TIMING A CLEARANCE Check. carburetor oiior screw srI;l,iI-rttnltnt CORHECTLT ADJUSTED I Checi-t for err leeks ND AIR r_Erti
F“ FE. I.’-I’-‘m F- r""‘“ K“ 1"‘-. F. F,-. I-'1-. l""" 1-Iowan. cm THUUB LESHDDTING Fllllll HIGH SPEED FEIIFIIIIIIIAIIBE ’°55‘ELE “"55 INCDHHEUF TIMING 31-i 1- lll CLEARANCE lIl' 'l_ [Ih||1;l-Q ignific-n timing B1 valw cluarancl CDHHEET TIMING E '1ILEAFl ANCE 1 Dlsuonmct lunr ti-ltlr at carhuratnr and check For crng-gmg l3l FIEETHIETED FUEL FLD'l'|I'—— a- ill l2l UNRESTRICTED FUEL FLOW i 3, Chuck; fi.p:l‘li|tu1'_fl|nl h'alIm_ CLUGEED l1] E: narburamr jet For cluqplnq ll] I3] NUT CLDGGED T 4 Huplmu |:arl;.|L|r!t|:|: mnin |u1 CDNDITIDN AGGHA'u'ATEDiI- [ll [El {EDNDITIDN IMPROVED E, Chuck v4|lu&1imin-g l-NC-U-HHECT ii‘ lill CORRECT l B, Chggk vulva §|:|-n|1g*[5|'15i|;|-n WORN DH‘ BHDKEN SPRING-it ill SFHING TENSION CORRECT Slillillllllfi EXHAUST ‘i Hun m0|::'rll'.'y'lI:lE a In-nq BLACK Ski-Gil-E EMITTEU iv ‘ill distzmm at hlqli weed lil 'l3l lil THIN EIl(l"lA|-..l5T EMITTED l5] 2. Flururn thruflle grlpl qul-cklv WHlT'E SNIUKE EHI‘l'TElIli1I- lll [2] ND WHITE BJDKE EMITTED T 3. Hun motoruvulu a lung WHITE SHI-DICE EMlT'l'ED-l—I- I1? rll-;1nn|:=e ul lnw spa-ad ll-ill 131 uncumnen EXHAUST Inna-rract timin-3 II‘-ll!-lFII’I'1ET1l lr‘||‘:lj:|l'fE'£I value claaranca Emmy luai tank Clqggfltl furl 'rul1a -ljluggmgl furl 1..-mt cm braallier l’lDlE' Clqggfid jel Clogged fuul Ii-ltflr Ciclgg-ed lual ualw J91 sizu ‘IIDCI small ll mncllricm ll‘I'I|JfrJ\FBl2l with small lIt! all Cluggud air clluflflr bl Chn-he nut opened fully incorrect ualw timing idil-I$tl'I'1Efl1 Faulty value snrlnn PDESIB LE CAUSE \|i'n|'r| |:','|i|1l',l:r Bl piflflh ring: -Dil lavll ton high Pi;-run. ring: lncn-rm-:t.l\-' installud Fault-¢ raimn cw cl»-llnder Flam in cylinder hnad ‘Worn lntal:-n ualvn lrulrln nr him Deusriurared vulva guide D-ring Wum exhaust valve gnlidu S: rtuffl E;+m|.|-51 v5l'n: guide lnen-rractllf aaatud Worn exhaust valw strrri I-Bil Data of ls:-ms: MW, 1530 In '3-HDNDA MDTUH CD- LTD. 1B-5
"rnuuetesuoetme C70 Hanna. _ z-",1 |illllT'f BLUTIIII PU5-SIB LE CAUSE T. Preperlv ecllusr clutch CLUTCH 5|_|PPmt3 —i -lg. 11; wqik ggumh -§pf|n.n {Ell Wr.'|H‘| ur ill!-tnrted clutch plate gr BlFlilBl.I.T Si'llF'i'lliE Eliiiilii IIUISE frlctitrn dist: PUSSIH L E CEUSE DIFFICULT sH|rr|r1ei- in ill E3} Hi [5] FED-M. NUT |iiETUHHEDiI- [I] TD NEUTRAL ii] GEARS .ll..Ilr.IlPlNG GUT OF -in H! POSITION iii Bremen geqr ehilr qrrtl 5|!lr|n||' Hrrritltn shift furl: 5luqgirri1 movement of ehiit drum E fork Bruit-tm shifting gear rlrcltrutiun Shift arm pawl tli.u:=ennet.1ed ir4:|fl'| shift drum Br-niten shift return fltlflflg Ehiil Bhrit lrrtlrfurrinq with tare tr-r cmiur Bent shifting near or we-rn $i1r-H lurk Brfl-lr-H‘ ur weirir-entrl shift rlrurrr stopper spnnu. PCi35l B L E CA USE VALVE Hfilfiifi in Hi PISTON -SLAP [Bi CAM CHAIN r~|u:sE?—-_- rrl I21 [3] CLUTCH cunrrieiiw 111 12] NDIST D-FH\I'E 5 DHiVEH-er Hi GEARS ii-?l Eartseslv-rl valve clearance Warn valve Worn nrunn He cvl-rrtler Ertcleilvr CBFl'lD11 in nnmhurrien chamber Worn piston pin 81-rrtmneetinq re-cl smell end Worn eemehelt hearing Wurn camshaft spmuitat teeth Exeeselveiv elongated drive chain Excessive clearance between clutch pine Er r:l|.rt|:h uuter Wlaltnnntl -clutch damp-er eprin-ii Wtrtn or deteriorated tlriuen gear deflq:-er Wflrfl gear teem 13-6 11$! Date ul iuu-e." Mae, 195111 '§?HUND-5. MEITDH CD, LTD. 1"-1. \- "‘=-. J .-I-\. I 1"“ "N .-I’-_'I-“Ll .'_'|,_ \
I lgeeuflmna F‘ ETI] TROUBLESHOOTING F l|lIIT0lIII'IBLE PIILLS Ti] IIIIE SIIIIE (‘Ii-\- if-‘I. ll;I"\. FOSSIB LE CAUSE DIFFICULT STEEHIHG uni» iii eutn DIRECTIONS iii i3i WHEEL wr:lee1_es E-P ii] ll’! I3] Ill [El IEI MOTORCYCLE FULLSE» III TO ONE SIDE III I31 lilII.lI.T'f FRIJIIT I‘: IIEMI Si-IIIIIII HBSIIIIBEIIS F‘ FlI.iLTI' BIIIIIE r"_"- .-I-5|‘ ELIIII GHED IIIIIIIE Bllllil .---1 Dwrtigh1eru=ti steering head tore threetl nut Brn-I-ten tteerrng rteel halls Bent steering Ir!!!" Eneeatrve uiiuv in wh-uni hearing Bmrrl.‘ wheel rim Loose nzle-ire: Ere-£E'l5l'|II ti-lav in Iw-l'|gnrl'fl Divfli hugfllttg Frgrrr-I: l:|en1 Drive ehiin acliusreu urwquellv .u.Ilun:e|:i Unhelanultfl frqnr E rear shtr-r:i~. aI!iHJl‘I'J€II"i Fr-gm it r|'-!-it wheel: nut alignncl Hem fr-:|nt I'|:|rl~; ur wringflm FOESIH LE CAUSE SOFT FIlDE—i m“ III Iii |-met: FHIJE Cir lri III NOISE IN SHOCK ABSOFIEEHE ill [El Weak !|Ill'lT‘|fl5 Excessive lead Feultv ire-fll fflrlt Fgultv rear sfhntllr iIIJ"llIlfI-IE! Faulrv stopper ruh-her Faulty rqir |I'|l,1riCI=! lib!-DTIJIFF PCIISSIB LE CAU SE INEFFECTWE ADJUSTER E-h II} SOUEAKING -ii I- III III I31 ill INEFFECTIVE BFIAKE Er III iii I3l HI IEI '|'l|l|}|'n brgl-tn lining, brelte shoe cum qr in-rate tzem Worn brake lining Fnreign ‘particles cm hrfli-ti lining Finugh brake |:ir|rrI1 1hr:-e ttantaetmg lat: Ihlurn imrltu |'.r-1|1E| huihinq Fault-,r Irent brake table E-riltrr shun pprtiallv contacted Mud ur water in hr-rlirl Dii er grI:r|1E on brake lining were nrelee lining POSSIBLE CAUSE iii III I3! Inutrrrerzt etljuitmums Hut lubringtetl guflileientlv ent:-ugh Wnm mrodrets Date nf issue: l‘|-ltlv, I-HBO "3 _ E:-HONDA MOTOR CCL, LTD. 7
5 E_=__’_m _H_>m_;_. 9 . ‘ IIEH M ,_ W ___ n :2. r Q __m"__“_u_ 539 HP __| E Q ' _mE___H__ mzmx g\o§§I W Q! ‘ ‘ w W1 W my‘ I _______ _“__ A‘: 1 (___; D.‘ rm L: w__ B H‘ Q 9‘, S3 ‘ $3 ggN| _:| 28 M G E D 1? I _ fig ___? 5 ma‘ CF“ ‘ _::_""_ _ _ \ F at it; S5 © W _ W; I‘ O I ‘ _' B ___ “El F5 E- __ ‘ _ _|__ m ___ S __ W: © w‘____ I __ Q _‘ If _ f I _ _ __ q > w:_:__a S25 E 5 Egr .s§_§ M-‘Q Elf? ________fl__ _ N N \ , f db ‘_®|__
2D. ‘B2 ADDENDUM .""‘- INTRODUCTION TI'I|s aII1;IencI1.Irn CO'I'II..E.lIl'lS rnfurmauun Iur IIIH ‘IHB2 ___ _ CTIII. Raf-er tr: the base shop manual for sewice infurr11aliI.III nu-I. included In this addendum, ALL INFORMATION, ILLUSTRATIONS, |J|I=IEc.- --~ TIONS ANIJ SPECIFICATIONB INCLUDED IN Tl-IIB PUBLICATION ARE BASEDON THE LATEST PROD UCT INFORMATION AMIAILABLE AT TI-IE TIME OF AFPFI-IIIIIAI. Fun PRINTING. HONDA MOTOR £10.. LTD. RESERVES THE RIGHT TO MAKE CHANGES -""_' AT ANY TIME WITHOUT NOTICE AND WITHOUT INCURRING ANT OBLIGATION WHATEVER. NO PART OF THIS PUBLICATION MAY B-E FIE- |F‘ROOUOED WITHOUT WRITTEN HONDA MOTOR 60., LTD. Surwricl PuI:IIiu'I:In-I1: Office .---. CONTENTS I. GENERAL INFORMATION . . . . . . . . . .. 20-2 7. LUBRICATION . . ... ... . . . . .. . . . . . . 20-5 3. INSPECTION AND ADJUETHENT . . .. . EU-5 lI.FUEL5“I'STEM...-...... .. .. .. . .. H20-R 5. CYLINDER HEADNALVE . . . . .. . . . . 2041 Ii. CLUTCH . . .. . . .. . .. . .. . . .. ... .. . . 2!]-‘I2 T. TRANSMISSION . .. .. .. . .. . .. . . . . . 2!]-‘I4 R. CAM CHAIN TENSIONEFI . .. . .. .. . . . 2!}-14 R. FRONT WHEELI'5IJSPEN$lON . . . . . .. 2!]-1? ‘I'D. HEAR WHEELISIJSPENSION . . . .. . . . 20-1? ‘I1. BATTERTICHARGING STSTEM . . . .. EU-TB ‘I2. IGNITION SYSTEM .. . . _ . . _ . . . . . . . . 2!]-22 ‘I3. ELECTRIC STAFITEFI . . .. . . . .. . . . .. QC-EB 14. TECHNICAL FEATU RES . .. . . . . . . . . 2U-ET ,-._ I5. TROUBLESHOOTING . . . . . .. . . .. . . . 2U-23 . ""\- -\ r'_'\ |F'_\ -t _ _ ‘I6. WIRING DIAGRAM . .. .. . . . . . . .. . .. 21]-3T Dane bf |;;u=: Nu-.-__19a1 "'9 2o_-I ‘ii-I-IONDA MOTOR CO-,LTO.
'82 ADDENO UM I. IIEIIEIIIII. IIIFDRIATIIIII SFEBIFIBITIIIIIS HONDA - ETD ITEM DIMENSIONS OIIBFBII IBfl§'ICI'I Dvérull '|IIl'II.'I‘l!I'I Ouirall height Minrrnurn qrI:IunI;I tlgu-rant: _ EII_v wa_§qht Lfiflfl mm I719 inI Bflilmm (26.0 InI 1,010 mrn (39.8 InI 150mm I{5.5in1 E2kgIIBfl.IIII:I-I FRAME Fmnt 1I.I1pIImiI:|rI, tnlvnl Rear u.|apem.IuI1, trnuel Caster angle TI'dIII Bntlum link BB mm [23 InI Swingiarm 51 mm IE'.:I- InI E3°3|II_' 1-'5 rnrn I195 InI M-an-:|munI torque OH qplnhr IntiIc| valve ENGINE O-pa-In Cline: ODBWI Chases E III‘!-nu IT vulva Englma welght I16 kg-m I-II.3\I ‘II-Il:].I'E,EIII1 rprn IJ.-E Iltun IIILB5 U5 III. 0.71 Imp I:|t‘r after disasawmbly 'I'.I5° ETDC I15" ABDE: 22.5“ BBDC 2.5" ATDC 20 I-cu [=1-4.1 IIIII lt‘I.U5mmIiIt CAFI BU R ETION Curt. |I:I-unLiI|I:.atInn nunmer PEIEA ELECTRICAL I|;|1iI»I:|n F uI| Ildulnipfl I3a|1urau:|r EIITIIT cauanitv Spud: plug Standard Fm‘ mid CIIITIIII III-‘IDW 5°C [l‘I°FI For extendud hlgh speed r1I:Iin:g CDI 23.5“ BTDC ut 3.100 rpm FI~,m.~I-I:-¢I A.C. gBr|EI‘l‘I-Ur EIIWIEIIDIJ rpm IEV-EAH u22I=sI=I:-u INIIII. cams INGKI uzursn-u II‘-IDI. cnaus INGKI uznrsn-u INDI. =:HI='IHs INGKI LIGHTS Headlight [high.I'|-aw beam] Turn slqml SIJBBEIOIWBTBT NI:u1rIII Indicrrur Turn slqnal Indrnamr High bum IIICIEDIIIUF 1'5|'?1'EW 3332 ED 15'! 3.'IW 3.-I'l‘II‘ ZN EAE ND. IDT3 SAE No. 158 5-PIE Nu. I53 20_2 '3" Onlacrflssuui M=~.,1m?.1 -EIHONOA MOTOR COL, LTD, .---\_ —I. I. I .-' '!q_ |' '- .=-5} I *""I "H """-. -HI
I-H f HONDA % CT II 112 ADDENDUM {T-'\. TDIIIIIIE IIALIIES ENGINE Turque ft-IIJ ,_ -1-|yq|—lIJi,\.1 'I.I'iI~.'u- .:|I;lj1.|$l1r‘II;1GrBIAI OII drim ho-It Fuul III‘I.Ul' I5DIl r‘ U, Thread ‘ '11" “I r,I'|l. Irrmll kg-m Elem-shaft sprocket 5 D-7' I-I F'.|'|i| I;IrL'I,IrI 1prI:\CIe-E1 B I-I-15 5 CI.'I'—I.‘I ‘II 2-III'~-2.5 ._ I].IJ3—-IJ.D5 5-H B-I1 12-15 5-H 15-IB 0.2-0.-I I‘-‘_.-. F FI RIM E I _ I It"“ GI“ din. Imml In;-rn l\.Ih3-I-FhI\-J-‘H-'|I"\-17*-'| TOP bridge eiue I.IuII: 5ue1-mg lock I"-II‘ , Engine hunger I:-all Hear ixle 5IEE‘|‘fl r1U'I Rear brake tn-r1:|ue IInI\I Ree: .II1I:II::II ebs1:IrI:I-er Swlngerm ni-m1. hr:-I'£ Fmnt epspeneran pw I:It hull Frcmt |I'II:II:Ic absorber upper IJCIII R Torque I Thread - It-1I:I I 2.5-3.5 0.8-1.2 2.0-3.0 3-5-4.5 1.5-2.5 2.5-3.5 TD as-3.5 5 2-0-15 I e en-2.5 ' ‘I mmmmm 1U 13-25 B-9 15-22 I3-33 I T-18 ‘I8--25 13-25 1EI—IB 1E—‘IEI “I” mots SPECIAL f‘ _"'I I_ Tug‘ Mm-|'||§ TCIDI HO . CI'l'I' FIef- WW I FI|,rwI'1 eel I'1CIIOIl' U‘-7915~I5I34mII:ID I 'l|"iI|'IIrII Id'|II!I‘LBI* D'I'HIIB-GB-I‘I»@CO I _ ‘H Flutgr puligr IIIII'5-II-3"‘-ZIIIIIIIIII 1 I 2'13-EIII LID-B EC-1'0 __ r"'“"‘~ I ‘Pu um er I15!-re: raw. Ieer II" 20 .. 3 fir HON CIA MOTOR CO-, LTD. —I--
‘B2 ADDE NDLIM BIBLE MID IIIIIIIESS IIDIITIIID .33 - '\\\ FRONT eenrce CABLE / _'|'-Q __ |;—;'Z:1:;_ L I II I -‘I -*'——_'J'_’I::._;-:"_——_~....'_‘ T: — —'__I I I - H‘. -I _ -. ___ '-. ' I ._\ . ..: . _,..- __ __,,,J H _ A F It — 15!; CHEIKECABLE I -I I THROTTLE CABLE —I__\_ EFEEDCIIIETEFI CABLE I I ,-".- _,-"-:-I-FT“-:::I'_:-‘.‘I\I.__--,-E .-" .- ' M Ir ff ‘I’ ‘-~:’.-*-=.__,_=-' 1; I .r'_... 1 fl .../23 II"-= ‘=1’-: . .3\ ‘I Pl:-_ I .:" l- _-If ‘T I‘: F -.' -. __ _ . I '..‘i|I?v-* “Q1- 1",‘:-I.‘ i__:_?> g_ I II TI'"'~‘"TTl-E .' ,.I_-¢' -' THROTTLE mete mlueenuess -_ pr; " °""“-E .@' I __ -‘I , _-"__.I .' I '|.:_H II . I '|' I ' I --I .l | I ‘I. I I I .. In NI III ‘~ 1 I JII1 .~., IIIAIH HARNESS II‘ '. _\,-._ I. -1'i.- ._‘ _ I ‘H. I . __ .- ‘__- F~r§'.' II-“*1:-. LII L -_ 4? ..;‘*~@.;’/1' ' _. .'| :.|,' . . L _i_ If‘ - J A..C. GEN EFIATOFI AFINESS '. ' -= '-;_ __ J - - _ II 2: III-RI ~- -ix. - 1.. -_' ...'.el1?T' _. ‘"-___.--" ‘II IE3" 'I€,|'.| / __ I‘_..@f’_ if ‘E I». I: _-,.- — ‘I _-9- ‘T-.___ ii.’ _.F'iI Iie-= _ _ '__ _ | -- .-*.~;§/" J} I _":—:§-‘I--. '- /I = __ ’__...-» _‘ -II?-'_-_' Ir‘ ' . . _ hm Y"’\%J K r‘ '- *~.__': -II-I"I_ “\1_. Id ""5. I , "'~.. -;/ ' . ' I ‘I- I2? .. -:- -F I i ’ --— -:1?"--. Fla 2o_ 4 '31 Dale of I-uue; Hum, 1ee1 EIHONDA urcrrue ccI.. rm. I-‘I-LI _"'-. .- -I“-H .-"_"H ""I ""\ "‘\