BMW R 100CS (1979-80) vs Suzuki GSX 250F Across (1990-91) vs CF Moto CFMoto 650NK (2012-15) vs Yamaha TDM 850 (1991-92)
Comparison technical specifications
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| Make: | BMW | Suzuki | CF Moto | Yamaha |
| Model: | R 100CS | GSX 250F Across | CFMoto 650NK | TDM 850 |
| Years: | 1979-80 | 1990-91 | 2012-15 | 1991-92 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, Parallel twin cylinder, DOHC, 4 valve per cylinder with 180° crankshaft, chain camshaft drive and single gear-driven counterbalancer | Four stroke, parallel twin cylinder, DOHC, 5 valves per cylinder |
| Capacity: | 980 cc / 59.8 cu in. | 249 cc / 15.2 cu in | Four stroke, Parallel twin cylinder, DOHC, 4 valve per cylinder with 180° crankshaft, chain camshaft drive and single gear-driven counterbalancer | 849 cc / 51.8 cu-in |
| Bore x Stroke: | 94 x 70.6 mm | 49 x 33 mm | 83.0 x 60.0 mm | 89.5 x 67.5 mm |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 9.5:1 | 12.5:1 | 11.3:1 | 9.2:1 |
| Induction: | 2x Constant depression carburetors, Bing 94/40/111 - 94/40/112 | 2 x Mikuni BSW27 carburetors | Electronic Fuel Injection | 2x Mikuni BDST88 carburetors |
| Ignition: | Battery ignition | Digital | ECU | Digital |
| Starting: | Electric | Electric | Electric | Electric |
| Max Power: | 51 kW / 70 hp @ 7000 rpm | 34 kW / 45 hp @ 14500 rpm | 69.7 hp / 51 kW @ 8500 rpm | 77 hp / 56.1 kW @ 7500 rpm |
| Max Torque: | 76 Nm / 7.75 kgf-m / 56 ft-lb @ 6000 rpm | 26.4 Nm / 2.7 kgf-m / 19.5 ft-lb @ 10500 | 62 Nm / 45.7 lb-ft @ 7000 rpm | 75.5 Nm / 55.6 lb-ft @ 6000 rpm |
| Transmission: | 5 Speed | 6 Speed, constant mesh | 6 Speed | 5 Speed |
| Final Drive: | Shaft | Chain | Chain | Chain |
| Front Suspension: | Telescopic fork with hydraulic shock absorber. | Telescopic forks | 41mm Telescopic fork | 41mm Telehydraulic forks, adjustable for preload and rebound |
| Rear Suspension: | Long swinging arm with adjustable strut. | Swingarm, monoshock | Extruded steel swingarm with tubular steel bracing and cantilever monoshock | Monocross single DeCarbon type gas-oil shock adjustable for preload and rebound |
| Front Brakes: | Single ∅260mm disc | Single 300 mm disc, 2 piston caliper | 2x 300mm discs, 2 piston caliper | 2x 298mm discs 4 piston calipers |
| Rear Brakes: | 200 Drum | Single 240 mm disc | Single 225mm disc, 1 piston caliper | Single 245mm disc 2 piston caliper |
| Front Tyre: | 3.25 - H19 | 110/70-17 | 120/70-17 | 110/80-18 |
| Rear Tyre: | 4.00 - H18 | 140/70-17 | 160/60-17 | 150/70-17 |
| Fuel Capacity: | 24 L / 6.3 US gal | 12 L / 3.2 US gal / 2.6 Imp gal | 17 Litres / 4.4 US gal | 18 Litres / 4.7 US gal |