Honda CB-1
Launched in 1989, the Honda CB-1 carved out a unique niche as a compact, high-revving naked bike that combined sporty performance with everyday usability. Its lightweight chassis, four-cylinder engine, and crisp handling made it a standout in the sub-400 cc class. Even decades after production ended, the CB-1 remains popular among riders seeking an agile, engaging machine that still turns heads.
Engine and Performance
Inline-Four Powerplant
At the heart of the CB-1 sits a 399 cc liquid-cooled inline-four engine featuring dual overhead cams and four valves per cylinder. With a redline of 13 500 rpm, it delivers a thrilling rush as it climbs through the rev range.
Output and Torque
Peak power is rated at 55 hp (41 kW) at 12 500 rpm, while maximum torque reaches 37 Nm at 10 500 rpm. This compact engine delivers a broad, usable powerband—strong from mid-range and soaring to its redline without hesitation.
Transmission and Final Drive
Six-Speed Gearbox
A close-ratio six-speed transmission provides precise shifts and helps riders stay in the engine’s sweet spot. The light clutch lever and smooth shift action make both city commuting and spirited canyon rides effortless.
Chain Final Drive
Power is routed through a 520-series chain and sprocket setup. A minimalist chain guard keeps maintenance easier while preserving the bike’s clean, uncluttered look.
Chassis and Suspension
Diamond-Frame Construction
The CB-1’s steel diamond frame strikes a careful balance between rigidity and compliance. Its geometry offers quick turn-in and stable high-speed tracking.
Front Suspension
A 37 mm conventional telescopic fork with 160 mm of travel handles road irregularities with poise. The fork’s tuning provides enough stiffness for aggressive riding without transmitting excessive harshness.
Rear Suspension
A single rear shock with adjustable preload and 140 mm of travel maintains rear traction under acceleration and soaks up bumps when cruising. Seven preload settings allow riders to dial in the perfect balance for solo or two-up riding.
Brakes and Wheels
Front Braking System
Dual 296 mm floating discs paired with two-piston calipers deliver strong stopping power and good feedback. Braided stainless-steel lines on later models enhance lever feel.
Rear Braking System
A single 220 mm disc with a single-piston caliper provides balanced braking performance and aids in smooth, progressive deceleration.
Wheels and Tires
Lightweight 17-inch cast aluminum wheels wear 110/70-17 front and 140/60-17 rear tires. This combination delivers nimble handling and sufficient grip for spirited road riding.
Dimensions and Weight
| Specification | Metric | Imperial |
|---|---|---|
| Wheelbase | 1 385 mm | 54.5 in |
| Seat Height | 785 mm | 30.9 in |
| Ground Clearance | 150 mm | 5.9 in |
| Fuel Capacity | 18 L | 4.8 US gal |
| Dry Weight | 166 kg | 366 lb |
| Wet Weight | 179 kg | 395 lb |
Fuel System and Electricals
Carburation
Dual 32 mm Keihin Constant-Velocity carburetors ensure smooth throttle response and easy tuning. Slide-style carburetors provide reliable performance across varying riding conditions.
Ignition and Lighting
A CDI ignition system delivers consistent spark timing and quick starts. The compact headlight assembly houses a 35 W halogen bulb, while LED tail and indicator lamps offer improved visibility and longevity.
Handling Characteristics
The CB-1’s low curb weight and narrow profile contribute to its razor-sharp agility. Riders praise its predictable turn-in, neutral cornering feel, and minimal steering effort. Whether darting through urban traffic or carving twisty backroads, the CB-1 inspires confidence.
Maintenance and Reliability
Routine Service Items
- Engine oil and filter change every 5 000 km
- Valve clearance check every 12 000 km
- Carburetor synchronization annually
- Chain lubrication and tension adjustment every 500 km
- Brake fluid replacement every two years
Known Issues
Early CB-1 models occasionally experienced camchain tensioner wear. Upgrading to a modern tensioner or regular inspection can prevent noisy operation. OEM parts remain readily available, ensuring long-term upkeep is straightforward.
Legacy and Influence
Although produced for just a few years, the CB-1 influenced a generation of compact naked bikes. Its blend of high-revving performance, light weight, and everyday practicality set a template many manufacturers would follow in the 1990s and beyond. Today, CB-1s are valued by collectors and riders who appreciate its historic role and timeless agility.
Conclusion
The Honda CB-1 stands as a testament to purposeful engineering and balanced design. Its exhilarating engine, nimble chassis, and practical ergonomics combine to create a motorcycle that remains as engaging today as when it first rolled off the factory floor. For enthusiasts seeking a compact naked bike that punches above its displacement, the CB-1 remains a modern classic worth discovering.
