Yamaha XS 650 / TX 650 (1973-74) vs Yamaha FZ-6S Fazer (2004) vs Yamaha XS 500 (1973-74) vs Honda XL 250 (1976-77) vs Yamaha YZF 600 R6 50th Anniversary (2006)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Honda | Yamaha |
| Model: | XS 650 / TX 650 | FZ-6S Fazer | XS 500 | XL 250 | YZF 600 R6 50th Anniversary |
| Years: | 1973-74 | 2004 | 1973-74 | 1976-77 | 2006 |
| Engine: | Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stole, parallel twin cylinder. DOHC | Four stroke, single cylinder, OHC | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 653 cc / 39.8 cu in | 599 cc / 36.5 cu-in | 498 cc / 30.5 cu-in | 248 cc / 15.1 cu-in | 599 cc / 36.5 cu-in |
| Bore x Stroke: | 75 x 74 mm | 65.5 x 44.5 mm | 73 х 59.6 mm | 74 X 57.8 mm | 67 x 42.5 mm |
| Compression Ratio: | 8.4:1 | 12.2:1 | 9.0:1 | 9.1:1 | 12.4;1 |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air cooled | Liquid cooled |
| Induction: | 2 x Mikuni carburetors | Group injection type fuel injection, 36mm Funnel diameter | 2x 38mm Mikuni carburetor | Single 28mm Keihin carburettor | Fuel Injection 38mm throttle bodies |
| Ignition: | Battery, induction coil | TCI Digital CDI | Battery and coil | Battery and coil | TCI |
| Starting: | Kick | Electric | Electric & kick | Kick | Electric |
| Max Power: | 39.5 kW / 53 hp @ 7200 rpm | 98 hp / 72 kW @ 12000 rpm | 48 hp / 36.5 kW @ 8500 rpm | 23.4 hp 17.5 KW @ 8000 rpm | 124.6 hp / 91.7 kW @14500 rpm |
| Max Torque: | 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 6800 rpm | 63.1 Nm / 6.4 kgf-m @ 10000 rpm | 4.5 kgf-m / 32.5 lb-ft @ 6500 rpm | NA | 69.1 Nm / 7.05 kg-m @ 11000 rp @ 1100 rpm |
| Transmission: | 5 Speed | 6 Speed | 5 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Chain | O-ring Chain |
| Front Suspension: | Telescopic forks | 43mm Telescopic fork, | Telescopic fork. | Telescopic forks | 41mm upside down forks with 2-way compression damping adjustable |
| Rear Suspension: | Dual shock absorbers | Swingarm Link less type Monocross | Dual shocks swing arm, preload adjustable! | Swinging fork | Fully adjustable rear shock absorber with 2-way compression damping |
| Front Brakes: | Single disc | 2x 298 mm discs | Single 267mm disc | 150 mm Drum | 2x 320mm discs |
| Rear Brakes: | Drum | Single 245 mm disc | Drum | 140 mm Drum | Single 220mm disc |
| Front Tyre: | 3.50-19 | 120/70 ZR17 | 3.25-19 | 2.75 -21 | 120/70 ZR17 |
| Rear Tyre: | 4.00-18 | 180/55 ZR17 | 3.50-18 | 4.00 -18 | 180/55 ZR17 |
| Fuel Capacity: | 12.5 Litres / 3.3 US gal | 19 Litres / 5.0 US gal | 12.8 Litres / 3 4 US gal | 9.5 Litres / 1.7 US gal | 17.5 Litres / 4.6 gal |