Complete coverage for your vehicle

Written from hands-on experience gained from the complete strip-down and rebuild of a Honda Motorcycle ST90, Haynes can help you understand, care for and repair your Honda Motorcycle ST90. We do it ourselves to help you do-it-yourself, and whatever your mechanical ability, the practical step-by-step explanations, linked to over 900 photos, will help you get the job done right. Regular servicing and maintenance of your Honda Motorcycle ST90 can help maintain its resale value, save you money, and make it safer to ride.

1973 Honda St90

Printed manual

Online manual

The Honda ST-series minibikes are known as the Dax in Japan and Europe, and the Trail 70 in Canada and the US. The ST70 was exported to Canada and the US as the CT70. This is an exception to Honda's usual practice of prefix letters indicating the bike family, followed by engine size. Pdf HONDA CT70 OWNERS MANUAL AND PARTS CATALOG DOWNLOAD.pdf download at 2shared. Click on document Pdf HONDA CT70 OWNERS MANUAL AND PARTS CATALOG DOWNLOAD.pdf to start downloading. 2shared - Online file upload - unlimited free web space. Oct 19, 2012  Fair Price on a ST 90? Fair Price on a ST 90? Maybe there were less of them than CT90-110's? The ST90 was only made a couple of years (1972-1974) so they bring serious coin as well. I called and left a message. If I do get it, I'll likely give it the candy apple red (or whatever Honda called it) paint job to match the CT70 that. This Page contains thumbnail images of all 68 pages of the Honda CT90 K2 owner’s manual. This manual conains valuable information about the Honda Trail CT90 motorcycle including regular maintenance, repair tips, part specifications, and various useful diagrams.

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What's covered

1972 Honda St90 Manual Download Windows 7

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

Honda St90 Forum

Table of contents

This vintage Honda motorcycle manual is 400 pages.

QUICK REFERENCE DATA

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)

INDEX

WIRING DIAGRAMS

Models Covered
1980 1981 1982 1983 HONDA C70 C 70
All Years HONDA C70M C 70 M
1966 1967 1968 1969 HONDA C90 C 90
All Years HONDA CL70 CL 70
All Years HONDA CL90 CL 90 L
All Years HONDA CL90L
1980 1981 1982 1983 1984 1986 HONDA CT110 CT 110
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 HONDA CT70 CT
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 HONDA CT90
All Years HONDA S65 S 65
1973 1974 1975 HONDA S90 S 90
1971 1972 HONDA SL70 SL
All Years HONDA SL90
1973 1974 1975 HONDA ST90
1974 1975 1976 HONDA XL70 XL
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 HONDA Z50A Z50 Z 50 A
1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989, 1991 1992 1993 1994 1995 1996 1997 1998 1999 HONDA Z50R Z50 Z 50 R 50R
Motosport 70 90
Single Overhead Cam Single Cylinder
Mini trail
Cub
Passport
Trail 70
Trail 90

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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)

Online manual

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• Conversion calculator – imperial and metric units