Yamaha SR 400 (1981-82) vs KTM 990 Super Duke (2004) vs Maico GP 360 (1988)
Comparison technical specifications
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| Make: | Yamaha | KTM | Maico |
| Model: | SR 400 | 990 Super Duke | GP 360 |
| Years: | 1981-82 | 2004 | 1988 |
| 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 |
| Capacity: | 399 cc / 24.3 cu-in | 999.8 cc / 60.9 cu-in | 354 cc / 21.6 cub in. |
| Bore x Stroke: | 87 х 67.2 mm | 101 x 62.4mm | 77 x 76 mm |
| Compression Ratio: | 8.5:1 | 11.5:1 | 13.5:1 |
| Cooling System: | Air cooled | Liquid cooling, | Liquid cooled |
| Lubrication: | Dry sump | Dry-sump lubrication with 2 rotor pumps | Oil bath |
| Starting: | Kick | Electric | Kick |
| Max Power: | 27 hp / 17.1 KW @ 7000 rpm | 88 kW / 120 hp @ 9000 rpm | 12.4 kW / 16.9 hp @ 6800 rpm (restricted) |
| Clutch: | Wet, Multiple Disc | Wet multi-disc clutch, operated hydraulically | Wet, cable operated |
| Transmission: | 5 Speed | 6 Speed | 5-Speed |
| Final Drive: | Chain | Chain, X-Ring 5/8 x 5/16" | Chain |
| Frame: | Steel Double Cradle | Chromium-Molybdenum trellis frame, powder-coated Subframe Aluminium Handlebar Aluminium Ø 28/22 mm (1.89"), tapered | Chrom-moly |
| Front Brakes: | Single disc | 2x 320mm discs 4 piston calipers | Disc |
| Rear Brakes: | Drum | Single 240mm disc 1 piston caliper | Disc |
| Front Tyre: | 3.50-19 | 120/70 ZR17 | 3.00 x 21 in. |
| Rear Tyre: | 4.00-16 | 180/55 ZR17 | 4.10 x 18 in. |
| Fuel Capacity: | 12 Litres / 3.2 gal | 18.5 Litres / 4.8 gal | 10 L / 2.6 US gal |