Yamaha XS 250 Special (1980-81) vs Yamaha YZF 600R Thundercat (2005-07) vs Yamaha XVS 650 V-Star Classic (2008-10) vs Yamaha SR 400 (1988-92) vs Yamaha XVS 1100 V-Star Silverado (2010-11)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | XS 250 Special | YZF 600R Thundercat | XVS 650 V-Star Classic | SR 400 | XVS 1100 V-Star Silverado |
| Years: | 1980-81 | 2005-07 | 2008-10 | 1988-92 | 2010-11 |
| Engine: | Four stroke, 180° parallel twin, SOHC, 2 valves per cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, 70°V-twin cylinder, SOHC | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, 75° V-twin cylinder SOHC, 4 valve per cylinder |
| Capacity: | 248 cc / 15.2 cu-in | 599 cc / 36.5 cu-in | 649 cc / 39.6 cu-in | 399 cc / 24.3 cu-in | 1063 cc / 64.8 cu-in |
| Bore x Stroke: | 55 х 52.4 mm | 62 x 49.6 mm | 81 x 63mm | 87 х 67.2 mm | 95 x 75 mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air cooled | Air cooled |
| Compression Ratio: | 9.3:1 | 12.0:1 | 9.0:1 | 8.5:1 | 8.3:1 |
| Induction: | 2x 32mm Mikuni carburetors | 4 x 36 mm Keihin CV downdraft carburetors | 2x 28mm Mikuni BDS28 CV carburetors | BSR33 carburetor | Carburetors |
| Ignition: | Coil and cb | Digital TCI | Digital TCI | CDI | TCI |
| Starting: | Kick | Electric | Electric | Kick | Electric |
| Max Power: | 26 hp / 20.1 kW @ 9500 rpm | 72.9 kW / 100 hp @ 11500 rpm | 40 hp / 29.2 kW @ 6500 rpm | 27 hp / 17.1 KW @ 7000 rpm | 62 hp / 45.2 kW @ 5750 rpm |
| Max Torque: | 2.1 kgf-m / 15.2 lb-ft @ 8500 rpm | 65.7 Nm / 6.7 kgf-m / 48.7 lb-ft @ 9500 rpm | 50.9 Nm / 37.5 lb-ft @ 3000 rpm | 27.4 Nm / 6.3 kgf-m @ 6500 rpm | 85 Nm / 62.7 lb-ft @ 2500 rpm |
| Transmission: | 6 Speed | 6 Speed | 5 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | 530 O-ring chain OEM sprocket sizes per tooth Front= 15 Back= 47 | Shaft | Chain | Shaft |
| Front Suspension: | Telescopic forks | 41 mm telescopic fork adjustable preload, compression and rebound damping | 41mm forks | Telescopic fork | 41mm telescopic front fork |
| Rear Suspension: | Dual shocks, swing arm, 5-position preload adjustable | Monoshock adjustable preload, bump and rebound | Adjustable link Monocross | Dual shocks | Link-type, preload-adjustable single rear shock |
| Front Brakes: | Single 267mm disc | 2x 300 mm Discs, 4 piston calipers | Single 298mm disc | Single disc | 2x 298mm discs 2 piston calipers |
| Rear Brakes: | 160mm Drum | Single 245mm disc, 2 piston caliper | 200mm Drum | Drum | Single 282mm disc 1 piston caliper |
| Front Tyre: | 3.00-18 | 120/60-17 | 130/90-16 | 3.50-19 | 130/90-16 |
| Rear Tyre: | 120/90 x 16 | 160/60-17 | 170/80-15 | 4.00-16 | 170/80-15 |
| Wheelbase: | 1375 mm / 54.1 in | 1415 mm / 55.7 in | 1626 mm / 64.0 in | 1410 mm / 55.5 IN | 1640 mm / 64.6 in |
| Seat Height: | 770 mm / 30.3 in | 810 mm / 31.7 in | 710 mm / 28 in | 790 mm / 30.9 in | 710 mm / 28 in |
| Fuel Capacity: | 14 Litres / 3.7 US gal | 19 Litres / 5.0 US gal / 4.2 Imp gal | 16 Litres / 4.2 US gal | 12 Litres / 3.2 gal | 17 Litres / 4.4 US gal |