Yamaha XT660R (2010) vs Suzuki Boulevard C50SE (2009-10) vs BMW R 45 (1982-85)
Comparison technical specifications
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| Make: | Yamaha | Suzuki | BMW |
| Model: | XT660R | Boulevard C50SE | R 45 |
| Years: | 2010 | 2009-10 | 1982-85 |
| Engine: | Four stroke, single cylinder, SOHC, 4 valve | Four stroke, 45° V-Twin | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. |
| Capacity: | 659 cc/ 40.2 cu-in | 805cc / 49.1 cu-in | 453 cc / 27.6 cu in. |
| Bore x Stroke: | 100 x 84 mm | 83 x 74.4 mm | 70 x 61.5 mm |
| Compression Ratio: | 10.0: 1 | 9.4:1 | 8.2:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Air cooled |
| Induction: | Fuel injection, 44 mm throttle body | Mikuni BDSR34 | 2 x Bing V65 carburetors |
| Ignition: | TCI | Electronic | Bosch contact free electronic ignition |
| Max Power: | 33.8 kW / 48 hp @ 6000 rpm | 33.6 kW / 45.1 hp @ 4000 rpm | 20 kW / 27 hp @ 6500 rpm |
| Max Torque: | 58.4 Nm / 5.7 kgf-m @ 5250 rpm | 62 Nm / 6.3 kgf-m / 45.7 ft-lb @ 4000 rpm | 37.5 Nm 3.8 kgf-m / 27.65 lb-ft @ 5500 rpm |
| Transmission: | 5 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Shaft | Shaft |
| Front Suspension: | 43 mm Telescopic forks, | Telescopic forks, coil spring oil damping | Telescopic hydraulic forks |
| Rear Suspension: | Oscillating arm standard Monocross. 200mm wheel travel | Link-type single shock, 7-way adjustable preload | Long swinging arm with adjustable strut |
| Front Brakes: | Single 298mm disc 2 piston caliper | Single 300 mm disc 2 piston caliper | 2 x ∅260mm Discs, 2 piston caliper. |
| Rear Brakes: | Single 245mm disc 1 piston caliper | Drum, 180 mm | Single ∅200mm drum |
| Front Tyre: | 90/90- 21 | 130/90-16M/C 67H | 1.85 - B18 |
| Rear Tyre: | 130/80–17 | 170/80-15M/C 77H | 2.50 - B18 |
| Fuel Capacity: | 15 Litres / 3.3 US gal | 15.5 Litres / 4.1 US gal | 22 Litres / 5.8 US gal |