| MODEL | YAMAHA XJ 650 TURBO 1982 - 1984 |
| Year | 1982 - 1984 |
| Engine Type | Four stroke, transverse four cylinder, turbocharged, 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 (approx. 81.7 Nm) @ 7000 rpm |
| Ignition | CDI |
| Induction | 4x 30 mm pressurized Mikuni CV carburetors, blow-through turbo |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | Wet, multi-plate |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | Tubular steel dual cradle |
| Front Suspension | 36 mm Showa, 140 mm travel, air-pressure adjustable |
| Rear Suspension | Dual Showa dampers, 79 mm travel, air and rebound damping adjustable |
| 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 |
| Top Speed | 203 km/h / 126 mph |
Yamaha's turbocharged XJ650 used a small Mitsubishi turbo tucked behind the gearbox in a blow-through layout, with forged pistons, lower compression, a knock sensor and an oil cooler. It made about 90 hp and was lively above roughly 6000 rpm, though turbo lag and its weight drew criticism. It was one of the few catalogue turbo bikes of the early 1980s, alongside the Honda CX500 Turbo.
