BMW R 100RS (1977) vs BMW F 650GS Dakar (2007) vs Beta RS 520 (2012)
Comparison technical specifications
Add bike |
Remove bike |
Remove bike |
Remove bike |
| Make: | BMW | BMW | Beta |
| Model: | R 100RS | F 650GS Dakar | RS 520 |
| Years: | 1977 | 2007 | 2012 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder | Four stroke, single cylinder, DOHC, 4 valves per cylinder | Four stroke, single cylinder,4 valve |
| Capacity: | 980 cc / 59.8 cub in. | 652 cc / 39.8 cub. in. | 497.4 cc / 30.4 cu in |
| Bore x Stroke: | 94 x 70.6 mm | 100 x 83mm | 100 x 63.4 mm |
| Compression Ratio: | 9.5:1 | 11.5:1 | 12.1:1 |
| Lubrication: | Wet sump | Wet sump | Twin oil pumps with cartridge oil filter. Separate oil for engine and clutch |
| Induction: | 2 x Constant depression carburettors, Bing 94/40/105 - 94/40/106 | Fuel induction | Keihin FCR-MX Ø 39mm |
| Ignition: | Battery ignition | Capacitor Discharge Ignition system | DC-CDI with variable ignition timing, Kokusan. |
| Starting: | Electric | Electric | Electric and kick |
| Clutch: | Dry single plate, with diaphragm spring | Multiple-disc clutch in oil bath, mechanically operated | Wet multi-disc |
| Transmission: | 5 Speed | 5 Speed | 6 Speed |
| Final Drive: | Shaft | Chain | O-ring chain, DID |
| Frame: | Double sown tubs, dual cradle | Bridge-type steel section frame with bolted-on rear section | Molybdenum steel with double cradle split above exhaust port. Air filter access from the side |
| Front Suspension: | Telescopic fork with hydraulic shock absorber. | 41mm Telescopic fork with stabilizer bridge | Sachs USD fork, Ø 48 mm, adjustable compression and rebound, TFX technology, |
| Front Wheel Travel: | 200 mm / 7.8 in | 210 mm / 8.3 in. | 290 mm / 11.4 in |
| Rear Suspension: | Long swinging arm with adjustable strut. | Spring setting and rebound stage damping continuously adjustable | Sachs shock w/adjustable rebound and hi/low speed compression, |
| Rear Wheel Travel: | 125 mm / 4.9 in | 210 mm / 8.3 in. | 290 mm / 11.4 in |
| Front Brakes: | 2 x ∅260mm discs, 2 piston calipers | Single ∅300mm disc, 2 piston caliper | Single Ø 260 mm floating disc, 2 piston caliper, Nissen |
| Rear Brakes: | Simplex ∅200 mm drum | Single ∅240mm disc, 1 piston caliper | Single Ø 240 mm disc, 1 piston caliper, Nissen |
| Front Tyre: | 3.25 - H19 | 90/90 S21 | 90/90 - 21 |
| Rear Tyre: | 4.00 - H18 | 130/80-17 | 140/80 -1 8 |
| Wheelbase: | 1465 mm / 57.67 in | 1479 mm / 58.2 in. | 1475 mm / 58.1 in |
| Seat Height: | 820 mm / 32.3 in | 870 mm / 34.3 in | 934.7 mm / 36.8 in |
| Fuel Capacity: | 24 Litres / 6.3 US gal | 17.3 Litres / 4.6 US gal. | 7.9 L / 2.1 US gal |