| MODEL | HONDA CB 400 SUPER FOUR 1999 - 2002 |
| Year | 1999 - 2002 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder, HYPER VTEC |
| 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 | 39 kW / 53 PS @ 11000 rpm |
| Max Torque | 38 Nm / 28 lb-ft @ 9500 rpm |
| Ignition | Full transistor |
| Induction | 4x Keihin VP04 32 mm carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed, constant mesh |
| Clutch | Wet, multi-plate, coil spring |
| Final Drive | 525 O-ring chain |
| CHASSIS SPECS | |
| Frame | Tubular steel double cradle |
| Front Suspension | 41 mm telescopic forks |
| Rear Suspension | — |
| Front Brakes | 2x 296 mm floating discs, 4 piston calipers |
| Rear Brakes | Single 240 mm disc, 2 piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2050 mm / 80.7 in |
| Overall Width | 725 mm / 28.5 in |
| Overall Height | 1070 mm / 42.1 in |
| Seat Height | 760 mm / 29.9 in |
| Wheelbase | 1415 mm (1999 - 2001) / 1410 mm (2002) |
| Ground Clearance | 130 mm / 5.1 in |
| Dry Weight | 168 kg (1999 - 2001) / 169 kg (2002) |
| Wet Weight | 188 kg (1999 - 2001) / 189 kg (2002) |
| WHEEL SPECS | |
| Front Tyre | 120/60 ZR17 55W |
| Rear Tyre | 160/60 ZR17 69W |
| FUEL SYSTEM | |
| Fuel Capacity | 18 Litres / 4.75 US gal |
| Fuel Consumption | 37.0 km/L (60 km/h constant speed) |
| Top Speed | — |
Photo: Canis820, CC BY-SA 4.0, via Wikimedia Commons
Photo: Uehara02, CC BY-SA 4.0, via Wikimedia Commons
The 1999 redesign introduced HYPER VTEC, which runs the engine on two valves per cylinder at low revs and switches to all four above about 6,750 rpm. The chassis got a shorter wheelbase, a lower engine mount and sportier 17-inch radial tyres, and the bike lost around 6 kg. The 2002 SPEC II update lowered the VTEC switch point, added an LCD odometer/clock and the HISS immobiliser.
