Yamaha XJ 650 Maxim (1982) vs Yamaha XS 650 Midnight Special (1981)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | XJ 650 Maxim | XS 650 Midnight Special |
| Years: | 1982 | 1981 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder, | Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. |
| Capacity: | 653 cc / 39.8 cu-in | 653 cc / 39.8 cu in |
| Bore x Stroke: | 63 х 52.4 mm | 75 x 74 mm |
| Cooling System: | Air-cooled | Air cooled |
| Compression Ratio: | 9.2:1 | 8.5:1 |
| Induction: | 4x 32mm Hitachi carburetors | 2 x Mikuni BS34SU carburetors |
| Ignition: | Transistorized | Battery, induction coil |
| Starting: | Electric | Electric and kick |
| Max Power: | 71 hp / 51.8 kW @ 9400 rpm | 39.5 kW / 53 hp @ 7200 rpm |
| Max Torque: | 57 Nm / 42 lb-ft @ 7500 rpm | 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 5500 rpm |
| Transmission: | 5 Speed | 5 Speed |
| Final Drive: | Shaft | Chain |
| Front Suspension: | 26mm Air assisted telescopic forks | Telescopic forks |
| Rear Suspension: | Duel Kayaba shocks, 5-way adjustable spring preload | Dual shock absorbers |
| Front Brakes: | Single 300mm disc | Twin hydraulic discs, 267 mm |
| Rear Brakes: | Drum | Single hydraulic disc, 267 mm |
| Front Tyre: | 3.25 H19 | 3.50S-19 |
| Rear Tyre: | 130/90 H16 | 130/90S-16 |
| Seat Height: | 744 mm / 29.3 in | 785 mm / 30.9" |
| Dry Weight: | 203 kg / 450 lbs | 210 kg / 463 lbs |
| Fuel Capacity: | 13 Litres / 3.4 US gal | 11.5 Litres / 3.0 US gal |