Yamaha SR 400 (1981-82) vs KTM 990 Super Duke (2004)
Comparison technical specifications
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| Make: | Yamaha | KTM |
| Model: | SR 400 | 990 Super Duke |
| Years: | 1981-82 | 2004 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, 75°V-twin cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 399 cc / 24.3 cu-in | 999.8 cc / 60.9 cu-in |
| Bore x Stroke: | 87 х 67.2 mm | 101 x 62.4mm |
| Compression Ratio: | 8.5:1 | 11.5:1 |
| Cooling System: | Air cooled | Liquid cooling, |
| Lubrication: | Dry sump | Dry-sump lubrication with 2 rotor pumps |
| Induction: | BSR33 carburetor | Electronic fuel injection / electric |
| Ignition: | CDI | Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment |
| Starting: | Kick | Electric |
| Max Power: | 27 hp / 17.1 KW @ 7000 rpm | 88 kW / 120 hp @ 9000 rpm |
| Max Torque: | 27.4 Nm / 6.3 kgf-m @ 6500 rpm | 100 Nm @ 7000 rpm |
| Clutch: | Wet, Multiple Disc | Wet multi-disc clutch, operated hydraulically |
| Transmission: | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain, X-Ring 5/8 x 5/16" |
| Frame: | Steel Double Cradle | Chromium-Molybdenum trellis frame, powder-coated Subframe Aluminium Handlebar Aluminium Ø 28/22 mm (1.89"), tapered |
| Front Suspension: | 35mm Telescopic fork | 48mm WP Upside down adjustable |
| Front Wheel Travel: | 105 mm / 4.1 in | 135 mm / 5.3 in |
| Rear Suspension: | Dual shocks, 5-way adjustable preload | WP shock, fully adjustable |
| Front Brakes: | Single disc | 2x 320mm discs 4 piston calipers |
| Rear Brakes: | Drum | Single 240mm disc 1 piston caliper |
| Front Tyre: | 3.50-19 | 120/70 ZR17 |
| Rear Tyre: | 4.00-16 | 180/55 ZR17 |
| Trail: | 111 mm / 4.4 in | 103 mm / 4.0 in |
| Wheelbase: | 1410 mm / 55.5 IN | 1438 mm / 56.6 in |
| Seat Height: | 790 mm / 30.9 in | 855 mm / 33.6 in |
| Ground Clearance: | 130 mm / 5.1 in | 165 mm / 6.4 in |
| Fuel Capacity: | 12 Litres / 3.2 gal | 18.5 Litres / 4.8 gal |