| MODEL | YAMAHA XJ 650 TURBO 1982 - 1983 |
| Year | 1982 - 1983 |
| Engine Type | Four stroke, turbocharged, transverse four cylinder, DOHC, 2 valves per cylinder |
| Displacement / Capacity | 653 cc / 39.8 cu in |
| Bore X Stroke | 63 x 52.4 mm |
| Compression Ratio | 8.2:1 |
| Cooling System | Air cooled |
| Max Power | 67.1 kW / 90 hp @ 9000 rpm |
| Max Torque | 8.33 kgf-m (81.7 Nm) @ 7000 rpm |
| Ignition | CDI |
| Induction | 4x 30 mm Mikuni CV carburettors, pressurised (blow-through turbo) |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | Wet, multi-plate |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | 36 mm Showa fork, air adjustable; 140 mm travel |
| Rear Suspension | Dual Showa dampers, air pressure and rebound adjustable; 79 mm travel |
| Front Brakes | 2x 266 mm discs |
| Rear Brakes | Single 200 mm drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 235 kg / 518 lbs |
| Wet Weight | 257 kg / 566.5 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.25-19 |
| Rear Tyre | 120/90 V18 |
| FUEL SYSTEM | |
| Fuel Capacity | 19.5 Litres / 5.0 US gal |
| Fuel Consumption | 43.2 mpg (test average) |
| Top Speed | 203 km/h / 126.1 mph |
Yamaha's first production turbo road bike, a four-cylinder shaft-drive machine with a small turbocharger tucked between gearbox and rear wheel and a blow-through carburettor setup. Compression was lowered and the engine strengthened to cope with boost, and a knock-sensing ignition retarded timing under load. Road testers found it fast above about 6,000 rpm but heavy, with noticeable turbo lag.
