Yamaha XS 650 / TX 650 (1973-74) vs Yamaha FZ-6S Fazer (2004)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | XS 650 / TX 650 | FZ-6S Fazer |
| Years: | 1973-74 | 2004 |
| Engine: | Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 653 cc / 39.8 cu in | 599 cc / 36.5 cu-in |
| Bore x Stroke: | 75 x 74 mm | 65.5 x 44.5 mm |
| Compression Ratio: | 8.4:1 | 12.2:1 |
| Cooling System: | Air cooled | Liquid cooled |
| Lubrication: | Wet sump | Wet sump |
| Induction: | 2 x Mikuni carburetors | Group injection type fuel injection, 36mm Funnel diameter |
| Ignition: | Battery, induction coil | TCI Digital CDI |
| Starting: | Kick | Electric |
| Max Power: | 39.5 kW / 53 hp @ 7200 rpm | 98 hp / 72 kW @ 12000 rpm |
| Max Torque: | 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 6800 rpm | 63.1 Nm / 6.4 kgf-m @ 10000 rpm |
| Transmission: | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Telescopic forks | 43mm Telescopic fork, |
| Rear Suspension: | Dual shock absorbers | Swingarm Link less type Monocross |
| Front Brakes: | Single disc | 2x 298 mm discs |
| Rear Brakes: | Drum | Single 245 mm disc |
| Front Tyre: | 3.50-19 | 120/70 ZR17 |
| Rear Tyre: | 4.00-18 | 180/55 ZR17 |
| Wheelbase: | 1410 mm / 55.5" | 1440 mm / 56.7 in |
| Ground Clearance: | 150 mm / 5.5" | 145 mm / 5.7 in |
| Dry Weight: | 191 kg / 420 lbs | 187 kg / 414.2 lbs |
| Fuel Capacity: | 12.5 Litres / 3.3 US gal | 19 Litres / 5.0 US gal |
| Top Speed: | 185 km/h / 115 mph | 227.8 km/h |