| MODEL | YAMAHA FZ 400R 1984 |
| Year | 1984 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 399 cc / 24.3 cu in |
| Bore X Stroke | 54 x 43.6 mm |
| Compression Ratio | 11.5:1 |
| Cooling System | Liquid cooled |
| Max Power | 44 kW / 59 hp @ 12000 rpm |
| Max Torque | 3.7 kgf-m @ 10000 rpm |
| Ignition | Digital TCI |
| Induction | 4x Mikuni BDST32 carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks |
| Rear Suspension | Monoshock |
| Front Brakes | 2x 282 mm discs |
| Rear Brakes | Single 210 mm disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 166 kg / 366 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 100/90-16 |
| Rear Tyre | 120/80-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 18 Litres / 4.75 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The FZ400R of 1984 was Yamaha's fast, light 400 sports bike with a liquid-cooled DOHC four and a 16-inch front wheel. Reviewers praised its precise handling, likening it to a GP machine, while criticising a thin seat, stiff suspension and limited steering lock. The engine felt flat in the midrange for road use.
