Yamaha SR 400 (2004-08) vs Yamaha XS 650 (XS-1) (1969) vs Yamaha RS 200 (1979-81) vs Yamaha XT 250 (2004-05)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | SR 400 | XS 650 (XS-1) | RS 200 | XT 250 |
| Years: | 2004-08 | 1969 | 1979-81 | 2004-05 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. | Two stoke, parallel twin | Four stroke, single cylinder. SOHC, 2 valve |
| Capacity: | 399 cc / 24.3 cu-in | 653 cc / 39.8 cu in | 195 cc / 11.8 cu-in | 249 cc / 15.2 cu-in |
| Bore x Stroke: | 87 х 67.2 mm | 75 x 74 mm | 52 x 46 mm | 74.0 x 58.0mm |
| Compression Ratio: | 8.5:1 | 8.4:1 | 6.5:1 | 9.5;1 |
| Cooling System: | Air cooled | Air cooled | Air cooled | Air cooled |
| Induction: | BSR33 carburetor | 2 x Mikuni carburetors | Single Mikuni, VM 24SS Carburetor | 34mm Mikuni carburetor |
| Ignition: | CDI | Battery, induction coil | Battery | CDI |
| Starting: | Kick | Kick | Electric & Kick | Electric |
| Max Power: | 27 hp / 17.1 KW @ 7000 rpm | 39.5 kW / 53 hp @ 7200 rpm | 17.7 hp / 13.0 kW @ 7500 rpm | 21 hp / 16.6 kW @ 6500 rpm |
| Max Torque: | 27.4 Nm / 6.3 kgf-m @ 6500 rpm | 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 6800 rpm | 18.3 Nm / 1.87 kg-m @ 6000rpm | 2.1 kgf-m / 15.1 lb-ft @ 6500 rpm |
| Transmission: | 5 Speed | 5 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Chain |
| Front Suspension: | Telescopic fork | Telescopic forks | Telescopic forks | 35mm Telescopic forks |
| Rear Suspension: | Dual shocks | Dual shock absorbers | Dual shocks | Monocross, Swingarm rebound-adjustable single shock |
| Front Brakes: | Single disc | Drum | Drum | Single 245mm disc |
| Rear Brakes: | Drum | Drum | Drum | Single 203mm disc |
| Front Tyre: | 3.50-19 | 3.50-19 | 2.75-17 | 80/70-21 |
| Rear Tyre: | 4.00-16 | 4.00-18 | 3.00-17 | 120/80-18 |
| Wheelbase: | 1410 mm / 55.5 IN | 1410 mm / 55.5" | 1245 mm / 49.0 in | 1359 mm / 53.5 in |
| Fuel Capacity: | 12 Litres / 3.2 gal | 12.5 Litres / 3.3 US gal | 11.5 Litres / 3.0 us gal | 9.8 Litres / 2.6 US gal |