Models Covered:

• Z50A (1969-1978)
• Z50R (1979-1989, 1991-1999)
• S65 (All Years)
• C70 (1980-1983)
• C70M (All Years)
• CL70 (All Years)
• CT70 (1969-1982)
• SL70 (1971-1972)
• XL70 (1974-1976)
• S90 (1973-1975)
• SL90 (All Years)
• ST90 (1973-1975)
• C90 (1966-1969)
• CL90 (All Years)
• CL90L (All Years)
• CT90 (1969-1979)
• CT110 (1980-1984, 1986)

CONTENTS

CHAPTER ONE / GENERAL INFORMATION
Manual organization / Service hints / Safety first / Parts replacement / Expendable supplies / Specifications

CHAPTER TWO / TROUBLESHOOTING
Operating requirements / Emergency requirements / Emergency troubleshooting / Engine starting problems / Operating problems / Clutch / Brakes / Transmission / Suspension

CHAPTER THREE / LUBRICATION, MAINTENANCE AND TUNE-UP
Daily checks / Routine checks / Service intervals / Crankcase breather hoses / Battery / Periodic lubrication / Engine oil change / Centrifugal oil filter rotor and oil filter screen cleaning / Fork oil change / Drive chain lubrication / Control cable service / Speedometer cable lubrication / Drive chain adjustment / Front brake adjustment / Rear brake adjustment / Centrifugal clutch adjustment / Manual clutch adjustment / Throttle adjustment / Air filter service / Fuel shutoff valve and filter service / Periodic maintenance / tune-up / Air cleaner element / Valve clearance adjustment / Camshaft chain tensioner adjustment / Compression test / Spark plugs / Contact breaker point ignition / Solid state ignition / Carburetor / Idle mixture adjustment / idle speed adjustment / Serial numbers / Specifications

CHAPTER FOUR / ENGINE
Engine lubrication / Removal installation / Cylinder head and camshaft / Valves and valve components / Camshaft chain and tensioner / Cylinder / Piston, pins and rings / Ignition advance mechanism / Alternator / Oil pump / Crankcase and crankshaft / Kickstarter / Electric starter gears / Break-in procedure / Specifications

CHAPTER FIVE / CLUTCH AND TRANSMISSION
Manual clutch / Centrifugal clutch / Clutch inspection / Clutch release mechanism removal/installation / Clutch cable / External shift mechanism / Drive sprocket / Transmission and internal shift mechanism / Preliminary transmission inspection / 3-speed transmission and internal shift mechanism (Type I) / 3-speed transmission and internal shift mechanism (Type II) / 4-speed transmission and internal shift mechanism (Type III) / 4-speed transmission and internal shift mechanism (Type IV) / Internal shift mechanism / Dual-range subtransmission / Specifications

CHAPTER SIX / FUEL AND EXHAUST SYSTEMS
Air cleaner / Carburetor operation service adjustments / Throttle cable / Choke cable / Fuel shutoff valve / Fuel tank / Crankcase breather system / Exhaust system / Specifications

CHAPTER SEVEN / ELECTRICAL SYSTEMS
Charging system / Battery / Rectifier / Alternator / Stator coil testing / Contact breaker point ignition / Ignition pulse generator / Ignition pulse generator and ignition advance mechanism / Spark plug / Ignition coil / Starting system / Starter / Starter solenoid / Lighting system / Handlebar switches / Handlebar switches / Rear brake light switch / Specifications

CHAPTER EIGHT / FRONT SUSPENSION AND STEERING
Front wheel / Front hub / Wheels / Tire changing / Tire repairs / Handlebar / Steering head / Front fork / Specifications

CHAPTER NINE / REAR SUSPENSION
Rear wheel / Rear hub / Driven sprocket assembly / Drive chain / Wheel balancing / Swing arm / Shock absorbers / Specifications

CHAPTER TEN / FRONT SUSPENSION AND STEERING
Front and rear brakes / Front brake cable / Specifications

SUPPLEMENT / 1988 AND LATER SERVICE INFORMATION
Battery (CT70 1991-on) / Spark plugs (Z50R 1988-on) / Carburetor adjustment (Z50R 1988-on) / Solid state ignition (Z50R 1988-on) / Cylinder head and camshaft (CT70 and Z50R 1991-on) / Valve and valve components (Z50R) / Kickstarter (50-70 cc engines) / Centrifugal clutch (1992 Z50R and 1991-on CT70) / Carburetor service (1988-on) / Evaporative control system (1991-on CT70) / Regulator/rectifier (1991-on CT70) / Alternator (1991-on CT70) / Capacitor discharge ignition CDI (1988-on Z50R and 1991-on CT70) / Tire changing (1988-on Z50R) / Rear hub (1991-on CT70)

WIRING DIAGRAMS