BMW R 80ST (1982) vs Suzuki GN 400E (1981-84) vs Suzuki GSX-R 750J (1988)
Comparison technical specifications
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| Make: | BMW | Suzuki | Suzuki |
| Model: | R 80ST | GN 400E | GSX-R 750J |
| Years: | 1982 | 1981-84 | 1988 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, single cylinder, SOHC, 4 valves | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 797.5 cc / 48.7 cu in. | 396 cc / 24.2 cu in | 748 c / 45.6 cub. in. |
| Bore x Stroke: | 84.8 x 70.6 mm | 88 х 65.2 mm | 73.0 x 44.7 mm |
| Cooling System: | Air cooled | Air cooled | Air/Oil cooled |
| Compression Ratio: | 9.2:1 | 9.3:1 | 10.9:1 |
| Induction: | 2 x Bing constant depression carburetors | 36mm Mikuni | 4 x 36 mm Mikuni constant-velocity semi-flatslide carburetors |
| Starting: | Electric | Kick | Electric |
| Max Power: | 36.4 kW / 50 hp @ 6500 rpm | 19.7 kW / 27 hp @ 7500 rpm | 80.2 kW / 112 hp @ 11000 rpm |
| Max Torque: | 58 Nm / 5.9 kgf-m / 42 ft/lb @ 4000 rpm | 29.4 Nm / 3.0 kgf-m / 21.7 lb-ft @ 5000 rpm | 74.5 Nm / 7.6 kgf-m / 54.9 ft-lb @ 10000 rpm |
| Transmission: | 5 Speed | 5 Speed | 6 Speed, constant mesh |
| Final Drive: | Shaft | Chain | #530 Chain, O-ring sealed, 108 links |
| Front Suspension: | Telescopic hydraulic fork | Telescopic fork | 43 mm Telescopic forks adjustable for preload rebound damping |
| Rear Suspension: | BMW Monolever swinging arm | Dual shocks | Full-floater Monoshock adjustable for preload rebound damping |
| Front Brakes: | Single ∅285mm disc, 1 piston caliper | Single disc | 2 x 310 mm Discs, 4 piston calipers |
| Rear Brakes: | ∅200mm Drum | Drum | Single 230 mm disc, 1 piston caliper |
| Front Tyre: | 100/90-H19 | 3.60-18 | 120/60 ZR17 |
| Rear Tyre: | 120/90-H18 | 4.60-16 | 160/60 ZR17 |
| Dimensions: | Length 2180 mm / 85.8 in Width 790 mm / 31.1 in Height 1150 mm / 45.2 in | Length: 2110 mm / 83.1 in Width: 840 mm / 33.1 in Height: 1200 mm / 47.2 in | Length 2055 mm / 80.9 in. Width 730 mm / 28.7 in. Height 1100 mm / 43.3 in. |
| Wheelbase: | 1447 mm / 56.9 in | 1410 mm / 55.5 in | 1400 mm / 55.1 in. |
| Fuel Capacity: | 19 Litres / 5.0 US gal | 11.5 Litres / 3.0 US gal / 2.5 Imp gal | 21 Litres / 5.5 US gal / 4.6 Imp gal |
| Top Speed: | 171 km/h / 106 mph | 146 km/h / 90.6 mph | 248.3 km/h / 154.3 mph |