Yamaha SR 400 (1981-82) vs KTM 990 Super Duke (2004) vs Maico GP 360 (1988) vs Suzuki ST 250E (2004-07) vs Suzuki GS 750TZ (1982-83)
Comparison technical specifications
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| Make: | Yamaha | KTM | Maico | Suzuki | Suzuki |
| Model: | SR 400 | 990 Super Duke | GP 360 | ST 250E | GS 750TZ |
| Years: | 1981-82 | 2004 | 1988 | 2004-07 | 1982-83 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, 75°V-twin cylinder, DOHC, 4 valves per cylinder | Single cylinder, two stroke, SOHC | Four stroke, single cylinder, SOHC, 2 valves | Four stroke, transverse four cylinders, DOHC, 4 valve per cylinder. |
| Capacity: | 399 cc / 24.3 cu-in | 999.8 cc / 60.9 cu-in | 354 cc / 21.6 cub in. | 249 cc / 15.2 cu in | 748 cc / 45.6 cu in |
| Bore x Stroke: | 87 х 67.2 mm | 101 x 62.4mm | 77 x 76 mm | 72.0 x 61.2 mm | 67 x 53.4 mm |
| Compression Ratio: | 8.5:1 | 11.5:1 | 13.5:1 | 9.2:1 | 9.4:1 |
| Cooling System: | Air cooled | Liquid cooling, | Liquid cooled | Air/oil cooled | Air cooled |
| Starting: | Kick | Electric | Kick | Electric and kick | Electric |
| Max Power: | 27 hp / 17.1 KW @ 7000 rpm | 88 kW / 120 hp @ 9000 rpm | 12.4 kW / 16.9 hp @ 6800 rpm (restricted) | 15 kW / 20 hp @ 7500 rpm | 49.6 kW / 68 hp @ 8500 rpm |
| Transmission: | 5 Speed | 6 Speed | 5-Speed | 5 Speed, constant mesh | 5 Speed |
| Final Drive: | Chain | Chain, X-Ring 5/8 x 5/16" | Chain | Chain, O-ring | Chain |
| Front Brakes: | Single disc | 2x 320mm discs 4 piston calipers | Disc | Single disc | Single 292 mm disc, 1 piston calipers |
| Rear Brakes: | Drum | Single 240mm disc 1 piston caliper | Disc | Drum | Drum |
| Front Tyre: | 3.50-19 | 120/70 ZR17 | 3.00 x 21 in. | 90/90-18M/C 51S | 3.25 H19 |
| Rear Tyre: | 4.00-16 | 180/55 ZR17 | 4.10 x 18 in. | 110/90-18M/C 61S | 4.50 H17 |
| Fuel Capacity: | 12 Litres / 3.2 gal | 18.5 Litres / 4.8 gal | 10 L / 2.6 US gal | 12 Litres / 3.2 US gal / 2.6 Imp gal | 16 Litres / 4.2 US gal / 3.5 Imp gal |