BMW F 650GS 30th Anniversary Special (2010) vs BMW R 90/6 (1973-76)
Comparison technical specifications
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| Make: | BMW | BMW |
| Model: | F 650GS 30th Anniversary Special | R 90/6 |
| Years: | 2010 | 1973-76 |
| Engine: | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. |
| Capacity: | 798 cc / 47.7 cub. in. | 898 cc / 54.8 cu in. |
| Bore x Stroke: | 82 x 75.8 mm | 90 x 70.6 mm |
| Compression Ratio: | 12.0:1 | 9.0:1 |
| Induction: | Electronic intake injection, ∅45mm throttle bodies | 2 x Bing constant depression carburetors |
| Ignition: | Knock control and oxygen sensors. | Battery ignition |
| Starting: | Electric | Electric |
| Max Power: | 62.5 kW / 85 hp @ 7500 rpm | 44.1 kW / 60 hp @ 6500 rpm |
| Max Torque: | 80 Nm / 8.2 kgf-m / 59 lb-ft. @ 5700 rpm | 73 Nm / 7.44 kgf-m / 53 ft lb @ 5500 rpm |
| Clutch: | Multiplate-plate in oil bath | Dry single plate, with diaphragm spring |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Chain | Shaft |
| Frame: | Tubular frame in steal partly carrying the engine | Double loop tubular frame with bolt on rear section |
| Front Suspension: | ∅43mm Marzocchi. Upside down forks | Telescopic hydraulic forks. |
| Front Wheel Travel: | 230 mm / 9.1 in. | 208 mm / 8.1 in |
| Rear Suspension: | Double strut swing arm aluminium coast in one piece, | Long swinging arm with adjustable strut. |
| Rear Wheel Travel: | 215 mm / 8.5 in. | 125 mm / 4.9 in |
| Front Brakes: | 2 x ∅300mm discs, 4 piston calipers | Single ∅260mm disc, 1 piston caliper |
| Rear Brakes: | Single ∅265mm disc, 2 piston caliper | 200mm Drum |
| Front Tyre: | 90/90 - 21 54V | 3.25 - H19 |
| Rear Tyre: | 150/70 - 17 69V | 4.00 - H18 |
| Seat Height: | 880 mm - 850 mm / 34.6 in. - 33.5 in. | 810 mm / 31.9 in |
| Wet Weight: | 209 kg / 460.8 lbs. | 210 kg / 462 lbs |
| Fuel Capacity: | 16 Litres / US 4.2 gal | 18 Liters / 4.75 US gal |