| MODEL | YAMAHA XJ 600 1988 - 1991 |
| Year | 1988 - 1991 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder |
| Displacement / Capacity | 598 cc / 36.5 cu in |
| Bore X Stroke | 58.5 x 55.7 mm |
| Compression Ratio | 10.0:1 |
| Cooling System | Air cooled |
| Max Power | 52.5 kW / 72 hp @ 10000 rpm |
| Max Torque | 53.9 Nm @ 8000 rpm |
| Ignition | CDI |
| Induction | 4x Mikuni BS32 carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks |
| Rear Suspension | Monocross rising rate with 5-way preload |
| Front Brakes | 2x 267 mm discs, 2 piston calipers |
| Rear Brakes | Single 267 mm disc, 1 piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 212 kg / 467.4 lbs |
| WHEEL SPECS | |
| Front Tyre | 90/90 V18 |
| Rear Tyre | 110/90 V18 |
| FUEL SYSTEM | |
| Fuel Capacity | 20 Litres / 5.3 US gal |
| Fuel Consumption | — |
| Top Speed | 205 km/h / 127 mph |
The later run of the air-cooled XJ600 continued until 1991 with the same 598 cc four, monoshock rear and twin front discs, before the Diversion (Seca II) took over. It was marketed in North America as the FJ600.
