Yamaha XV 1900 Roadliner S (2006-07) vs Yamaha XVS 650 V-Star Custom Midnight (2006) vs Yamaha XVS 250 Drag star (2006-07) vs Yamaha YZF R6S (2006-07) vs Yamaha DT 250 (1979-80)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha | Yamaha | Yamaha |
| Model: | XV 1900 Roadliner S | XVS 650 V-Star Custom Midnight | XVS 250 Drag star | YZF R6S | DT 250 |
| Years: | 2006-07 | 2006 | 2006-07 | 2006-07 | 1979-80 |
| Engine: | Four stroke, pushrod 48° V-Twin, OHV, 2 valves per cylinder | Four stroke, 70°V-twin cylinder, SOHC, 2 valve per cylinder | Four stroke, V-twin cylinder, SOHC, 2 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Two stroke, single cylinder |
| Capacity: | 1854 cc / 113 cu-in | 649 cc / 39.6 cu-in | 249 cc / 15.2 cu-in | 599 cc / 36.5 cu-in | 246 cc / 15.0 cu-in |
| Bore x Stroke: | 100 х 118 mm | 81 x 63mm | 49 x 66 mm | 67 x 42.5 mm | 70 x 64 mm |
| Cooling System: | Air cooled | Air cooled | Air cooled | Liquid cooled | Air cooled |
| Compression Ratio: | 9.5:1 | 9.0:1 | 10.0:1 | 12.8:1 | 6.8:1 |
| Induction: | Twin-bore electronic fuel injection, 43mm throttle bodies and throttle position sensor | 2x 28mm Mikuni BDS28 CV carburetors | Carburetor | Fuel Injection | Single 28mm Mikuni VM28SS |
| Ignition: | Digital TCI | Digital TCI | Digital CDI | Digital TCI | External-rotor magneto; CDI; six-volt battery |
| Starting: | Electric | Electric | Electric | Electric | Kick |
| Max Power: | 98.6 hp / 72.0 kW @ 4250 rpm | 40 hp / 29.2 kW @ 6500 rpm | 21 hp / 15.4 kW @ 8000 rpm | 127 hp / 94.7 kW @14500 rpm | 17 hp 12.6 kW @ 6000 rpm |
| Max Torque: | 166.7 Nm / / 17 kg-m / 123 ft-lb @ 2250 rpm | 50.9 Nm / 37.5 lb-ft @ 3000 rpm | 20 Nm / 15.3 lb-ft @ 6000 rpm | 66 Nm / 48.6 lb-ft @ 1100 rpm | 20.7 Nm / 15.3 lb-ft @ 5500 rpm |
| Transmission: | 5 Speed | 5 Speed | 5 Speed | 6 Speed | 5 Speed |
| Final Drive: | Belt | Shaft | Chain | Chain | Chain |
| Front Suspension: | 46mm telescopic forks, | 41mm forks | Cartridge telescopic forks | 41mm upside down forks with 2-way compression damping adjustable | Oil-damped, coil-spring fork with forward-mounted axle and |
| Rear Suspension: | Single shock, link-type, | Adjustable link Monocross | Dual shock, Swingarm | Fully adjustable rear shock absorber with 2-way compression damping | DeCarbon-type, nitrogen-charged mono-shock producing |
| Front Brakes: | 2x 298mm discs 4 piston calipers | Single 298mm disc | Single 282mm disc | 2x 320mm discs | Conical hub with drum brake |
| Rear Brakes: | Single 320mm disc 4 piston caliper | 200mm Drum | 130mm Drum | Single 220mm disc | Conical hub with rod-actuated drum brake |
| Front Tyre: | 130/70 -18 | 100/90-19 | 80/100-18 | 120/70 ZR17 | 3.00-21 |
| Rear Tyre: | 190/60 -17 | 170/80-15 | 130/90-15 | 180/55 ZR17 | 4.00-18 |
| Dry Weight: | 340 kg / 748 lbs | 214 kg / 471 lbs | 147.0 kg / 324. lbs | 161 kg / 355 lbs | 122 kg / 269 lbs |
| Fuel Capacity: | 17 Litres / 4.4 us gal | 16 Liters / 4.2 US gal | 11 Litres / 2.9 US gal | 17.5 Litres / 4.6 US gal | 8.5 Litres / 2.2 gal |