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Clymer Yamaha YZ50-80 Monoshock 1978-1990 Repair Manual

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SKU: M393 Category:

Description

This Clymer Yamaha YZ50-80 Monoshock 1978-1990 Repair Manual provides detailed service information, step-by-step repair instruction and maintenance specifications for 1980 Yamaha YZ50, 1981-1982 Yamaha YZ60, and 1978-1990 Yamaha YZ80 Monoshock motorcycles.

Includes everything you need to know to perform tune-up and routine maintenance on the engine, clutch and transmission, fuel and exhaust, ignition system, steering and suspension, wheels, brakes and tires, electrical system, frame and body. Features complete wiring diagrams and 350 illustrated pages.

Clymer Yamaha YZ50-80 Monoshock 1978-1990 Repair Manual Table of Contents

QUICK REFERENCE DATA

CHAPTER ONE / GENERAL INFORMATION
Manual organization / Notes, cautions and warnings / Safety first / Service hints / Washing the motorcycle / Torque specifications / Fasteners / Lubricants / Parts replacement / Basic hand tools / Test equipment / Expendable supplies / Mechanic’s tips

CHAPTER TWO / TROUBLESHOOTING
Operating requirements / Troubleshooting instruments / Starting the engine / Starting difficulties / Engine starting / Engine performance / Engine noises / Excessive vibration / Two-stroke pressure testing / Clutch / Transmission / Brakes / Front suspension and steering / Ignition system (YZ50) / Ignition system (YZ60 and YZ80) / Liquid-cooling system

CHAPTER THREE / LUBRICATION, MAINTENANCE AND TUNE-UP
Pre-checks / Tires and wheels / Lubricants / Cleaning solvent / Engine lubrication / Periodic lubrication / Periodic maintenance / Engine tune-up / Storage

CHAPTER FOUR / ENGINE TOP END
Engine principles / Engine lubrication / Engine cooling / Cleanliness / Servicing engine in frame / Cylinder head / Cylinder / Piston, wrist pin and piston rings / Break-in procedure / Reed valve assembly

CHAPTER FIVE / ENGINE LOWER END
Servicing engine in frame / Engine / Crankcase and crankshaft

CHAPTER SIX / CLUTCH, EXTERNAL SHIFT MECHANISM AND KICKSTARTER
Clutch cover / Clutch / Primary drive pinion gear / Clutch cable / Clutch release mechanism / External shift mechanism / Kickstarter (1978-1980) / Kickstarter (1981-on)

CHAPTER SEVEN / TRANSMISSION AND INTERNAL SHIFT MECHANISM
Transmission operation / Transmission overhaul (5-speed) / Transmission overhaul (1979-1980 6-speed) / Transmission overhaul (1981-on 6-speed) / Internal shift mechanism (1978-1980) / Internal shift mechanism (1981-on)

CHAPTER EIGHT / FUEL AND EXHAUST SYSTEMS
Carburetor operation / Carburetor service (1978-1982) / Carburetor adjustments / Fuel shutoff valve / Fuel tank / Fuel filter / Yamaha energy induction system (YEIS) / Exhaust system / Exhaust system repair

CHAPTER NINE / IGNITION SYSTEM
Contact breaker point ignition (YZ50) / Capacitor discharge ignition / Magneto (outer rotor type) / Magneto (inner rotor type) / Stator coil testing (all models) / Capacitor discharge ignition unit / Ignition coil / Spark plug / Engine kill switch

CHAPTER TEN / LIQUID COOLING SYSTEM
Cooling system inspection / Radiator / Water pump

CHAPTER ELEVEN / FRONT SUSPENSION AND STEERING
Front wheel / Front hub / Wheels / Tire changing / Tire repairs / Handlebar / Steering head and stem (1978-1981 and 1983) / Steering head and stem (1982 YZ80) / Steering head and stem (1984-on) / Front fork (YZ50, YZ60 and 1978-1982 YZ80) / Front fork (1983-on)

CHAPTER TWELVE / REAR SUSPENSION
Rear wheel / Rear hub / Driven sprocket / Drive chain / Rear suspension (deCarbon monoshock system) / Swing arm (1978-1982) / Swing arm and relay arm (1983-on) / Rear suspension bushing and bearing replacement (all models)

CHAPTER THIRTEEN / BRAKES
Drum brakes / Front brake cable replacement / Front disc brake (1986-on) / Front brake pad replacement / Front caliper / Front master cylinder / Front brake hose replacement / Front brake disc / Bleeding the system

CHAPTER FOURTEEN / SUSPENSION ADJUSTMENT
Yamaha factory accessories / Suspension travel measurement / Front forks / Rear shock absorber (1978-1981) / Rear shock absorber (1982-on)

INDEX

WIRING DIAGRAMS

Additional information

Weight 1.42 lbs
Dimensions 9 × 7 × 0.4 in
ISBN

9780892874958

UPC

24185749530

Brand

Clymer