Yamaha RD 250LC / RZ 250LC (1982-83) vs BMW F 800ST (2007)
Comparison technical specifications
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| Make: | Yamaha | BMW |
| Model: | RD 250LC / RZ 250LC | F 800ST |
| Years: | 1982-83 | 2007 |
| Engine: | Two stroke, parallel twin | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 247 cc / 15.0 cu-in | 798 cc / 47.7 cub. in. |
| Bore x Stroke: | 54 х 54 mm | 82 x 75.8 mm |
| Cooling System: | Liquid cooled | Liquid cooled |
| Compression Ratio: | 6.2 :1 | 12.0:1 |
| Induction: | 2x Mikuni VM28 SC carburetor | Electronic intake injection |
| Ignition: | CDI | Knock control and oxygen sensors. |
| Starting: | Kick | Electric |
| Max Power: | 35.5 hp / 26.1 kW @ 8500 rpm　 | 62.5 kW / 85 hp @ 8000 rpm |
| Max Torque: | 30.2 Nm / 3.1 kgf-m@ 8000 rpm | 80 Nm / 8.16 kgf-m / 59 lb-ft @ 5800 rpm |
| Clutch: | Wet multi-plate | Cable-operated multiplate-plate wet clutch |
| Transmission: | 6 Speed | 6 Speed |
| Final Drive: | Chain | Belt drive with shock damper |
| Front Suspension: | Telescopic forks | ∅43mm Telescopic forks |
| Rear Suspension: | Monocross | Die-cast aluminium single sided swinging arm with rear wheal axle and eccentric adjustment, central spring stud , spring pre-loaded hydraulically adjustable to continuously variable levels by means of handwheel, rebound damping adjustable. |
| Front Brakes: | Single 267mm disc | 2 x ∅320mm discs, 4 piston calipers |
| Rear Brakes: | Drum | Single ∅265mm disc, 2 piston caliper |
| Front Tyre: | 3.00-18 | 120/70 ZR17 |
| Rear Tyre: | 3.50-18 | 180/55 ZR17 |
| Dimensions: | Length 2080 mm / 81.8 in Width 750 mm / 29.5 in Height 1090 mm / 42.9 in | Length: 2,082 or 2,195 mm / 82.0 or 86.4 in Width (incl. mirrors): 860 mm / 33.9 in Height (excl. mirrors): 1,155 or 1,225 mm / 45.5 or 48.2 in |
| Seat Height: | 785 mm / 30.9 in | 820 mm / 32.2 in (low seat: 790 mm / 31.1 in) |
| Dry Weight: | 139 kg / 306.4 lbs | 187 kg / 412 lbs |
| Fuel Capacity: | 16.5 Litres / 4.3 US gal | 16 L / 4.2 US gal |
| Consumption Average: | 40 mpg | 5.0 L/100 km / 20.1 km/l / 47 US mpg |
| Standing ¼ Mile: | 14.6 sec | 12.0 sec |
| Top Speed: | 98 mph / 157.7 km/h | 229.0 km/h / 107 mph |