The Honda CB900F, also known as the Super Sport or simply the CB900, is a classic standard motorcycle that was introduced in the early 1970s and gained popularity throughout the late 1970s and early 1980s. It was designed to combine high performance, reliability, and versatile everyday usability. Known for its smooth inline-four engine and precise handling, the CB900F became an iconic model in Honda’s CB series, bridging the gap between sportbikes and practical street motorcycles.
Engine Architecture and Performance
The CB900F is powered by an air-cooled, inline four-cylinder engine. Honda engineered it to deliver both smooth low-end torque and high-revving performance, making it suitable for both spirited riding and long-distance touring.
Key engine specifications include:
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Displacement: 901 cc
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Configuration: Inline four-cylinder, air-cooled, DOHC
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Bore x Stroke: 64.5 mm x 69 mm
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Compression Ratio: 9.0:1
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Valve Train: 16 valves, dual overhead camshaft
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Carburetion: Four constant-velocity carburetors
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Ignition: Electronic CDI (Capacitor Discharge Ignition)
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Power Output: Approximately 95–100 horsepower at 8,000 rpm
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Torque: Approximately 58–60 lb-ft at 6,000 rpm
The engine emphasizes smooth power delivery, with a broad torque curve that ensures manageable acceleration in city traffic while providing sufficient top-end performance for highways.
Transmission and Drivetrain
The CB900F features a five-speed manual transmission with a conventional wet multi-plate clutch.
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Final Drive: Chain-driven, with standard sprockets for balanced acceleration and cruising
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Gear Ratios: Designed to optimize both city maneuverability and highway speed
This drivetrain ensures responsive shifting and reliable power transfer to the rear wheel. The chain drive allows for easy maintenance and tuning compared to shaft-driven motorcycles.
Chassis and Frame
Honda developed the CB900F with a steel double-cradle frame, which provides a balance of strength, rigidity, and manageable weight. The design supports high-speed stability while remaining nimble in corners.
Chassis specifications:
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Frame Type: Steel double-cradle
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Wheelbase: 1,485 mm
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Rake/Trail: 27 degrees / 110 mm
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Dry Weight: Approximately 230 kg
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Seat Height: 790 mm
The geometry provides predictable handling characteristics and allows riders of varying experience levels to maintain control in both urban and open-road conditions.
Suspension System
The suspension system of the CB900F is designed to offer a combination of comfort and precise handling.
Front Suspension:
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Type: Telescopic fork
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Travel: Approximately 130 mm
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Adjustability: Non-adjustable on early models, limited preload adjustment on later versions
Rear Suspension:
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Type: Dual shock absorbers with adjustable preload
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Travel: Approximately 110 mm
This setup provides a compliant ride for everyday use while remaining stable during aggressive cornering.
Braking System
The CB900F employs a dual-disc braking system at the front and a single drum or disc at the rear, depending on model year.
Front Brakes:
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Dual hydraulic discs
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Disc Diameter: 275–296 mm
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Calipers: Two-piston
Rear Brake:
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Drum or single hydraulic disc
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Diameter: 180–220 mm
This braking configuration provides sufficient stopping power for both solo and two-up riding while maintaining predictable brake feel.
Wheels and Tires
Honda equipped the CB900F with wheels and tires designed for stability and traction across a range of conditions.
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Front Wheel: 19-inch cast alloy or spoked wheel depending on model year
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Rear Wheel: 18-inch cast alloy or spoked
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Front Tire: 3.50-19 or equivalent
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Rear Tire: 4.00-18 or equivalent
The tire sizes ensure a balance of responsive handling and comfortable ride characteristics, suitable for commuting and touring.
Fuel System and Efficiency
The fuel system of the CB900F is carbureted and optimized for smooth delivery across the rev range.
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Fuel Capacity: Approximately 17 liters (4.5 gallons)
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Fuel System: Four CV carburetors
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Fuel Economy: 30–40 mpg depending on riding style and conditions
This setup ensures reliable throttle response and consistent performance under a variety of riding conditions.
Bodywork and Styling
The CB900F features a classic standard motorcycle aesthetic, with a minimally faired design that emphasizes a combination of sportiness and practicality.
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Materials: Steel and aluminum components for frame and bodywork, plastic for side covers
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Seat: Long and slightly stepped for rider and passenger comfort
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Handlebars: Upright position for relaxed ergonomics
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Instrumentation: Analog speedometer, tachometer, fuel gauge, and indicator lights
The styling offers a timeless, understated look while maintaining functional ergonomics for both urban and long-distance riding.
Electrical System
The electrical system of the CB900F is straightforward and reliable.
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Battery: 12V maintenance-free
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Lighting: Halogen headlamp, turn signals, and tail/brake light
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Ignition: Electronic CDI for precise spark timing
The system is engineered for minimal maintenance while ensuring dependable performance.
Comfort and Ergonomics
The CB900F prioritizes rider and passenger comfort. Its upright riding position, spacious seat, and wide handlebars reduce fatigue on long rides.
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Rider Position: Upright, slightly forward-leaning for sport-oriented control
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Passenger Accommodation: Comfortable stepped seat with grab handles
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Wind Protection: Limited, suitable for standard motorcycle category
Maintenance and Reliability
The CB900F is recognized for its durability and ease of maintenance. Regular chain adjustments, valve checks, and oil changes are straightforward due to the simple mechanical layout. The air-cooled engine ensures fewer components prone to failure compared to liquid-cooled counterparts, enhancing long-term reliability.
Model Variations and Evolution
The CB900F saw incremental improvements throughout its production. Changes included minor aesthetic updates, improved carburetor tuning, and optional features like electronic ignition or upgraded brakes. The CB900C, a cruiser variant, was based on the CB900F’s mechanical foundation, showcasing the versatility of its platform.
Legacy and Influence
The Honda CB900F is regarded as a milestone in the standard motorcycle category. Its combination of high-revving inline-four performance, stable handling, and reliability influenced subsequent sport and standard motorcycles. Enthusiasts continue to value it for its mechanical simplicity, approachable power, and classic Honda engineering.
Conclusion
The Honda CB900F is a versatile and reliable motorcycle that successfully blends sportbike performance with everyday usability. Its inline-four engine, steel double-cradle frame, and comfortable ergonomics make it suitable for both spirited riding and long-distance cruising. With a legacy of durability and practical design, the CB900F remains an enduring example of Honda’s engineering excellence in the standard motorcycle segment.
