Suzuki GSX-R 400 (1984) vs Suzuki Boulevard C50T (2013-14) vs Suzuki GSX 400S Katana (1992-93) vs KTM 640 LC4 Adventure (2006-07)
Comparison technical specifications
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| Make: | Suzuki | Suzuki | Suzuki | KTM |
| Model: | GSX-R 400 | Boulevard C50T | GSX 400S Katana | 640 LC4 Adventure |
| Years: | 1984 | 2013-14 | 1992-93 | 2006-07 |
| Engine: | Four stroke, transverse four cylinder, DOHC 4 valves per cylinder. TSCC | Four stroke, 45° V-Twin | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, single Cylinder. SOHC, 4 Valve per cylinder |
| Capacity: | 398 cc / 24.3 cu-in | 805cc / 49.1 cu-in | 399 cc / 24.3 cu in | 624.6 cc / 38.1 cu in |
| Bore x Stroke: | 53 x 45.2 mm | 83 x 74.4 mm | 52 x 47 mm | 101 x 78 mm |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 11.5:1 | 9.4:1 | 11.8:1 | 11.0:1 |
| Induction: | 2 x AS27VW carburetors | Mikuni BDSR34 | Mikuni BST32 carburetors | Mikuni BST 40 |
| Ignition: | CDI | Electronic | Fully transistorized | Contactless DC-CDI ignition with digital advanced system, KOKUSAN |
| Starting: | Electric | Electric | Electric | Kick & electric |
| Max Power: | 44 kW / 59 hp @ 11000 rpm | 39 kW / 52 hp @ 6000 rpm | 39.5 kW 53 hp @ 10500 rpm | 35.7 kW / 49 hp @ 7500 rpm |
| Max Torque: | 39.2 Nm / 4.0 kgf-m / 28.9 lb-ft @ 9000 rpm | 69 Nm / 7.04 kgf-m / 51 lb-ft @ 3200 rpm | 38.2 Nm / 3.9 kgf-m / 28.2 lb-ft @ 9500 rpm | 52 Nm / 5.3 kgf-m / 38.4 lb-ft @ 5500 rpm |
| Clutch: | Wet multi-plate | Wet, multiple discs, cable operated | Wet, multiple plates, coil spring | Wet, multiplate |
| Transmission: | 6 Speed, constant mesh | 5 Speed | 6 Speed | 5 Speed, claw shifted |
| Final Drive: | Chain | Shaft | Chain | Chain |
| Front Suspension: | Telescopic forks | Telescopic forks, coil spring oil damping | Telescopic forks | 50 mm WP upside-down forks |
| Rear Suspension: | Full floater swing arm, non-adjustable | Link-type single shock, 7-way adjustable preload | Dual shocks | WP monoshock |
| Front Brakes: | 2 x Discs, 4 piston calipers | Single disc, 2 piston caliper | Double disc | 2X 300mm sisc |
| Rear Brakes: | Single disc, 2 piston caliper | Drum | Single disc | Single 220mm disc, 1 piston floating caliper |
| Front Tyre: | 110/90-16 | 130/90-16M/C 67H, tube type | 100/80 -18 | 90/90 - 21 54S Enduro 3 |
| Rear Tyre: | 140/90-18 | 170/80-15M/C 77H, tube type | 140/70 -17 | 140/80 - 18 70R Enduro 3 |
| Wheelbase: | 1425 mm / 56.1 in | 1655 mm / 65.2 in | 1 430 mm / 56.3 in. | 1510 mm / 59.4 in |
| Seat Height: | 780 mm / 30.7 in | 700 mm / 27.6 in. | 750 mm / 29.5 in. | 945 mm / 37.2 in |
| Fuel Capacity: | 15 Litres / 3.96 US gal / 3.3 Imp gal | 15.5 Litres / 4.1 US gal | 17 L / 4.5 US gal / 3.7 Imp gal | 28 Litres / 7.4 US gal / 6.2 Imp gal |