NOTICE AVIS Thismanual was written bythe Yamaha Motor Ce manuel a _t_ 6crit par la Yamaha Motor Company primarily for useby Yamaha dealers Company _. l'intention des concessionnaires and theirqualified mechanics. It is not possi- Yamaha et de leurs m_caniciens qualifies. II ble to put an entire mechanic's education into n'est pas possible de mettre toute la formation one manual, so it is assumed that persons us- d'un m$canicien dans un seul manuel, et il a ing this book to perform maintenance and donc 6t6 suppos_ que les personnes utilisant ce repairs on Yamaha machines have a basic livre pour ex_cuter l'entretien et les r6parations understanding of the mechanical concepts and des machine Yamaha ont une comprehension procedures inherent to motorcycle repair _16mentaire des principes m6caniques et des technology. Without such knowledge, atternp- procedures inh_rents _ la technique de r_para- ted repairs or service to this model may render tion de motocyclettes. Sans une telle connais- it unfit to use and/or unsafe, sance, l'ex_cution de r_parations ou de l'entre- tien de ce module peut le rendre impropre l'emploi et/ou dangereux. Yamaha Motor Company, Ltd. is continually La Yamaha Motor Company, Ltd. s'efforce en striving to improve all models manufactured by permanence d'am_liorer tous ses produits. Les Yamaha. Modifications and significant changes modificacions et les changements significatifs in specifications orprocedureswill be forward- dans les caract_ristiques ou les procedures ed to all Authorized Yamaha dealers and will, seront notifi6s _ tous les concessionnaires where applicable, appear in future editions of Yamaha et para_tront, _ l'endroit appropri6, this of this manual, clans les 6ditions futures de ce manuel. Particularly important information is distingui- Darts ce manuel, les informations particuli_re- shed in this manual by the following notations: ment importantes sont rep6r6es par les nota- tions suivantes: NOTE: N.B.: A NOTE provides key information to make pro- Un N.B. fournit les informations cl_ pour ren- cedures easier or clearer, dre les procedures plus faciles ou plus claires. A CAUTION indicates special procedures that Un ATTENTION indique les proc6dures sp_- must be followed to avoid damage to the ciales devant &re suivies pour 6viter d'endom- machine, mager la machine. A WARNING indicates special procedures that Un AVERTISSEMENT indique les proc6du- must be followed to avoid injury to a machine res sp6ciales devant _tre suivies pour 6viter un operator or person inspecting or repairing the accident/_ l'utilisateur de la machine ou h la machine, personne l'inspectant ou la r6parant. OVERSEAS SERVICE SERVICE D'OUTRE-MER OVERSEAS OPERATIONS OPERATIONS D'OUTRE-MER YAMAHA MOTOR CO., LTD. CIF LTEE. YAMAHA MOTOR Downloaded from www.ScooterTime.net
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iNDEX GENERAL iNFORMATiON I PERIODIC iNSPECTiONS AND ADJUSTMENTS ENGINE OVERHAUL CARBURETION CHASSIS !i ELECTRICAL APPENDICES Downloaded from www.ScooterTime.net
INDEX RENSEIGNEMENTS GENERAUX INSPECTIONS ET REGLAGES PERIODIQUES _ REVISION DU MOTEUR CARBURATION PARTIECYCLE /_/ PART_ ELECTRIQUE APPENDICES Downloaded from www.ScooterTime.net
CHAPTER 1 GENERAL INFORMATION MAIN FEATURES ............................................ 1-1 Newly Designed OHV Single 180 cc Engine ....................... 1-1 90° Twisted OHV ................................................ 1-1 Valve System (Hydraulic Valve Lifters) ........................... 1-2 Balancer ........................................................ 1-6 V-Belt Automatic Transmission .1-8 Torque Cam Mechanism ......................................... 1-9 Carburetor Auto-Choke ......................................... 1-12 Starting Enricher ............................................... 1-18 MCV {Mixture Control Valve) ................................... 1-19 Air Cleaner ..................................................... 1-20 Front Suspension ............................................... 1-21 Electric Fuel Meter ............................................. 1-22 MOTORCYCLE IDENTIFICATION .1-24 Vehicle Identification Number .................................. 1-24 Engine Serial Number ................................ ......... .1-24 SPECIAL TOOLS ............................................. 1-25 For Tune-up .................................................... 1-25 For Engine Service ............................................. 1-25 For Chassis Service ............................................ 1-30 For Electrical Components ...................................... 1-30 Downloaded from www.ScooterTime.net
CHAPITRE 1 RENSEIGNEMENTS GENERAUX PRINCIPALES PARTIECULARITES ....................... 1-1 Nouveau Moteur de 180 cm3Soupape enT_te ........................ 1-1 Soupape en T_te dans rAxe du Vilebrequin .......................... 1-1 Syst_me de Soupape (Poussoirs Hydrauliques) ........................ 1-2 Balancier ........................................................ 1-6 Transmission Automatique _ Courroie Trapezoidale ................... 1-8 Mecanisme _ Came de Commande .................................. 1-9 Carburateur _ Starter Automatique ................................ 1-12 Enrichisseur de Demarrage ........................................ 1-18 MCV (Clapet de Commande de Melange) ........................... 1-19 Fiitre _ Air ..................................................... 1-20 Suspension Avant ................................................ 1-21 Jauge _ Carburant Electrique ..................................... 1-22 IDENTIFICATION DE LA MACHINE ................... 1-24 Num6ro d'Identification du V6hicle ................................ 1-24 Num6ro de S6rie du Moteur ....................................... 1-24 OUTILS SPECIAUX ......................................... 1-2s Pour la Mise au Point ............................................ 1-25 Pour la R6paration du Moteur .................................... 1-25 Pour ia R6parafion de la Partie Cycle ........ . ..................... 1-30 Pour les Composants Electriques .................................. 1-30 Downloaded from www.ScooterTime.net
CHAPTER 1 CHAPITRE 1 GENERAL RENSEIGNEMENTS iNFORMATiON GENERAUX MAIN FEATU RES PRINCIPALES PARTIECULARITES Newly Designed OHV Single 180 cc Engine Nouveau Moteur de 180 cm3 Soupapeen T@te This engine is a short stroke type (bore x stroke Ce moteur a une faible course (al_sage × -- 63 minx55 mm (2.48x2.16 in)). The course=63x55mm(2,48x2,16in)).Lecylin- cylinder is adeep forward-leaning type and dre est fortement inclin_ vers l'avant et les sou- OHV system is adopted, papes sont en t_te. 90° Twisted OHV Soupapes en T@te dans rAxe du Vilebrequln The OHV engine which is adopted to deliver Le moteur/l soupapes en t_te qui est adopt_ required power development characteristics pour sescaract_ristiques de puissance optima- and also to reduce total mass, has a79° for- les et aussi pour sa faible masse totale a un wardleaning cylinder. In addition, OHV system cylindre inclin_ de 79° vers l'avant. En plus, is 90 ° twisted from crank angle and push rod les soupapes ent_te sont dans l'axe du vilebre- is driven from the front of the cylinderso that quin et les tiges des culbuteurs sont attaqu_es engine heightis reduced. Intake and exhaust par l'avant du cylindre afinde r_duire lahau- systems are arranged very effectively, teur du moteur. Les syst_mes d'admissionet d'_chappement sont disposestrSs efficacement. 1-1 Downloaded from www.ScooterTime.net
VALVE SYSTEM SYSTEME DE SOUPAPES (HYDRAULIC VALVE LIFTERS) (POUSSOIRES HYDRAULIQUES) Description Description Engine runs quiter usinga hydraulic valve lifter L'emploi de poussoirs hydrauliques dans le in the valve system because there is no valve syst_me de soupapes permet d'obtenir une mar- clearance during operation, che de moteur tr_s silencieuse,vu qu'il n'y a The valve clearance is automatically adjusted pas de jeu de soupape. Lejeu de soupapeest while the engine is running, sothat no adjust- automatiquement compens_quand le moteur ment is required, est en marche, si bien qu'aucun r6glage n'est n6cessaire. PUSH ROD TIGES DE CULBUTEURS HYDRAULIC TAPPET EX \\ (VALVE LIFTER) EC \\ POUSSOIRS HYDRAULIQUES \\ \ \!lL il/ , All The valve lifter islocated between the camshaft Le poussoir est situ6 entre l'arbre h cames et and pushrod and made up mainly of thebody, la tige de culbuteur. Ses principales pi_ces sont high pressure chamber, check ball, oil reser- le corps, la chambre haute pression, la bille de volt, andplunger, retenue, le r6servoir d'huile et le plongeur. When the cam lobe has passed the lifter, the Quand le lobe de la came a d6pass6 le pous- oil in the oil reservoirflowsoutand accordingly, soir, l'huile du r_servoir s'_coule et par suite the plunger moves down, but it is pushed up le plongeur descend, mais il est pouss6 vers le bythe return springso thai no tappet clearance haut par le ressort de rappel et il n'y a ainsi pas isallowed. This creates a partial vacuum in the de jeu de poussoir. Ceci cr6e un vide partiel high pressure chamber and thus, oil flows in- dans la chambre haute pression et ainsi l'huile to the high pressure chamber, p6n_tre dans cette chambre. 1-2 Downloaded from www.ScooterTime.net
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YAMAHA RIVA 180 XC180 Scooter Service Repair Manual 1983-1985