| TECHNICAL SPECIFICATION | 
|---|
| Model ID | 
|---|
| Manufacturer (Make) | Yamaha | 
| Model Name | XS 650 | 
| Year | 1977 | 
| Category(class) | Classic | 
| Engine | 
|---|
| Engine Capacity (Displacement) | 654 ccm (39.91 cubic inches) | 
| Engine Type | Twin | 
| Bore x Stroke | Ø75.0 mm x 74.0 mm (Ø2.95 inches x 2.91 inches) | 
| Bore/Stroke Ratio | 1.01 | 
| Stroke | 4 | 
| Valves per Cylinder | 2 | 
| Timing System | OHC | 
| Cooling System | Air | 
| Powertrain | 
|---|
| Gearbox | 5 speed | 
| Chassis/Suspension/Brakes | 
|---|
| Front Brakes | Dual disc | 
| Rear Brakes | Drum | 
| Front Tire | 3.25-19 | 
| Rear Tire | 4.00-18 | 
| Dimensions | 
|---|
| Curb Weight | 227 kg (500 lb) | 
| Fuel Capacity | 15 litres (3.96 gallons) | 
| Performance | 
|---|
| Max Power | 50.00 HP (36.5 kW) at 6800 RPM | 
| Power/Weight Ratio | 0.22 Hp/Kg | 
| Top Speed | 181 km/h (112mph) | 
| Acceleration (dart, speedup) time |  | 
| 0-100 km/h | 6.1 seconds | 
| 0-60 mph | 5.8 seconds | 
| 1/4 mile | - | 
| 60 to 140 km/h, highest gear | - |