The Original Dual Sport Motorcycle

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1961 - Early Trail
1962 - Trail 50
1963 - Trail 55
1964 - Trail 90
1965 - Trail 90
1966 - Trail 90 'K0
1967 - Trail 90 'K0
1968 - Trail 90 'K0
1969 - Trail 90 'K1
1970 - Trail 90 'K2
1971 - Trail 90 'K3
1972 - Trail 90 'K4
1973 - Trail 90 'K4
1974 - Trail 90 'K5
1975 - Trail 90 'K6
1976 - Trail 90
1977 - Trail 90
1978 - Trail 90
1979 - Trail 90
1980 - Trail 110
1981 - Trail 110
1982 - Trail 110
1983 - Trail 110
1984 - Trail 110
1986 - Trail 110
2008 - Trail 110
1977 - Trail 125
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Quick Comment

1971 - Trail 90 'K3

The 1971 Honda CT90 'K3, continued the use of model designations that started with the letter 'K", followed by a number. There were only a few changes from the previous year to the CT90 'K3 and no mid year changes in 1971. The Yellow color was changed to Summer Yellow. The exhaust was now a black body with a chrome heat shield.
The "States", via their Department of Motor Vehicles (DMV) or similar named agencies, control the regulation of equipment on vehicles and NOT the United States Federal Government (which could be a more "uniform" set of laws, used in all states). Thus, each state is allowed to set it's own laws regarding equipment on vehicles. Several states (California, Georgia, Kansas, Maine, Massachusetts, Nevada, New Hampshire, & Oregon) had already written laws requiring motorcycles to have turn signals as standard equipment by the end of 1973 (start of 1974). Several motorcycle manufacturers, including Honda, were preparing for this requirement and had in fact started installing turn signals on other models. The best evidence of this is the inclusion within the speedometer of an indicator light for turn signals and on some years the left handlebar switch to activate the turn signals. The 1971 'K3, had the extra light for indicating the activity of turn signals (often called "winkers" in documentation, and labeled with a "W" on the speedometer face). And, there are a few reports of 1971 'K3's having turn signals factory installed, but as of yet we don't have photo proof.
Model ID
CT90 'K3
Common Name
Honda Trail 90
Serial or VIN Number Begins At
Engine Size
89 cc
Engine Type
Overhead Camshaft
Carburetor Type
High Altitude Knob Present
Fuel Petcock Positions - ON RES OFF
Jets - Factory - Other
Transmission Speeds
4 Speeds
Transmission Shift Pattern (Toe)
High - Low Gearing Option
Dual Range Sub Transmission
Suspension Front
Telescopic Shocks
Suspension Rear
Telescopic Shocks
Speedometer Highest Speed
80 mph
Speedometer Indicator Lights
Green = Neutral
Amber = Turn Signals
Red = High Beam
Speedometer Trip Odometer
Brake Activation Front
Right Handlebar Lever
Brake Activation Rear
Right Foot Lever and Left Handlebar Lever
Rear Cargo Rack, Size & Shape
Large with Rear Vertical Bar
Handlebar Rotates
Handlebar Color
Chrome Tube Style
Paint Color
Scarlet Red
Summer Yellow
Auxiliary Gas Tank
Turn Signals
Other Unique Features
Gray Downtube Cover.
Grey, Battery & Tool Kit Side Cover.
Black Exhaust with Chrome Shield. (First Year)


Right Side
Left Side
We need a Rear photo to put here!
Engine Right Side
Engine Left Side
Air Box

Right Side
Left Side
Engine Right Side
Engine Left Side

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