Yamaha XS 650 (XS-2) (1972) vs Yamaha FZ 600 (1988)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | XS 650 (XS-2) | FZ 600 |
| Years: | 1972 | 1988 |
| Engine: | Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder. |
| Capacity: | 653 cc / 39.8 cu in | 599 cc / 36.5 cu-in |
| Bore x Stroke: | 75 x 74 mm | 58.5 x 55.7 mm |
| Compression Ratio: | 8.4:1 | 10.0:1 |
| Cooling System: | Air cooled | Air cooled |
| Lubrication: | Wet sump | Wet sump |
| Induction: | 2 x Mikuni BS38 carburetors | 4X BS30 Mikuni carburetors |
| Ignition: | Battery, induction coil | Transistorized |
| Starting: | Kick | Electric |
| Max Power: | 39.5 kW / 53 hp @ 7200 rpm | 54.6 hp / 39.8 kW @ 9400 rpm |
| Max Torque: | 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 6800 rpm | 44 Nm / 32.4 lb-ft @ 7500 rpm |
| Transmission: | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Telescopic forks | 36mm Kayaba forks air pressure |
| Rear Suspension: | Dual shock absorbers | Showa single shock |
| Front Brakes: | Single disc | 2x 269mm discs 2 piston caliper |
| Rear Brakes: | Drum | Single 240mm disc 1 piston caliper |
| Front Tyre: | 3.50-19 | 100/90-16 |
| Rear Tyre: | 4.00-18 | 120/80-18 |
| Dry Weight: | 185 kg / 408 lbs | 186 kg / 410 lbs |
| Fuel Capacity: | 12.5 Litres / 3.3 US gal | 16 Litres / 4.2 US gal |
| Top Speed: | 185 km/h / 115 mph | 208.8 km/h |