| MODEL | HONDA CB-1 1989 - 1990 |
| Year | 1989 - 1990 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 399 cc / 24.3 cu in |
| Bore X Stroke | 55 x 42 mm |
| Compression Ratio | 11.3:1 |
| Cooling System | Liquid cooled |
| Max Power | 41.2 kW / 55.2 hp @ 10000 rpm |
| Max Torque | 39 Nm / 29 lb-ft @ 9500 rpm |
| Ignition | CDI |
| Induction | Keihin 32.5 mm CV carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel twin-beam perimeter |
| Front Suspension | Showa 41 mm telescopic forks, non-adjustable |
| Rear Suspension | Pro-link monoshock, 7-way preload adjustable |
| Front Brakes | Single 310 mm disc, 2-piston caliper |
| Rear Brakes | Single 240 mm disc, 1-piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2035 mm / 80.1 in |
| Overall Width | 705 mm / 27.8 in |
| Overall Height | 1025 mm / 40.4 in |
| Seat Height | 775 mm / 30.5 in |
| Wheelbase | 1370 mm / 54 in |
| Ground Clearance | — |
| Dry Weight | 179 kg / 395 lbs |
| Wet Weight | 187 kg / 413 lbs |
| WHEEL SPECS | |
| Front Tyre | 110/70-17 |
| Rear Tyre | 140/70-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.3 US gal |
| Fuel Consumption | — |
| Top Speed | 190 km/h / 118 mph |
The CB-1 was a naked 400 cc four built around a midrange-tuned version of the CBR400RR's engine, sitting in a steel twin-spar frame. Honda pitched it as a versatile all-rounder, and testers loved its smooth engine, light steering and comfortable riding position, while criticising the soft fork, bump-sensitive shock and tiny fuel tank. It sold slowly in the US, where leftover 1990 bikes were still being discounted in 1992.
