Aprilia RX 125C (1993-94) vs Suzuki GSX 400F Katana (1983-84) vs Suzuki Boulevard C50T (2005-06)
Comparison technical specifications
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| Make: | Aprilia | Suzuki | Suzuki |
| Model: | RX 125C | GSX 400F Katana | Boulevard C50T |
| Years: | 1993-94 | 1983-84 | 2005-06 |
| Engine: | Single cylinder, two stroke, Rotax 123, Gilardoni 2 cylinder/head | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, 45° V-Twin |
| Capacity: | 124.8 cc / 7.6 cu in | 398 cc / 24.3 cu in | 805cc / 49.1 cu-in |
| Bore x Stroke: | 54 x 54.5 mm | 53 x 45.2 mm | 83 x 74.4 mm |
| Compression Ratio: | 12.5:1 | 10.2:1 | 9.4:1 |
| Induction: | VHSB34 LD carburetor | 4 x Mikuni BS26SS carburetors | Mikuni BDSR34 |
| Starting: | Kick | Electric | Electric |
| Max Power: | 25.7 kW / 34.5 hp @ 10800 rpm | 30.8 kW / 41.3 hp @ 10500 rpm | 33.6 kW / 45.1 hp @ 4000 rpm |
| Max Torque: | 21.6 Nm / 2.2 kgf-m / 15.9 lb-ft @ 10500 rpm | 30.2 Nm / 3.1 kgf-m / 22.3 lb-ft @ 8500 rpm | 62 Nm / 6.3 kgf-m / 45.7 ft-lb @ 4000 rpm |
| Transmission: | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | #520 Chain, 12T to 17T pinion gear, 49T spur gear | Chain, DAIDO DID50UB, 104 links | Shaft |
| Front Suspension: | Marzocchi upside down fork | Telescopic fork, oil dampened | Telescopic forks, coil spring oil damping |
| Rear Suspension: | Swingarm with single shock absorber, Aprilia Progressive System with fully adjustable Boge Sachs shock absorber | Swingarm, dual shocks, oil dampened, spring 5-way adjustable | Link-type single shock, 7-way adjustable preload |
| Front Brakes: | Single Ø 250 mm disc | 2 x Discs | Single 300 mm disc 2 piston caliper |
| Rear Brakes: | Single Ø 220mm disc | Single disc | Drum, 180 mm |
| Front Tyre: | 90/90-21 | 3.25-S19 4PR | 130/90-16M/C 67H |
| Rear Tyre: | 120/80-19 | 3.75-S18 4PR | 170/80-15M/C 77H |
| Dry Weight: | 105 kg / 231 lbs | 179 kg / 395 lbs | 246 kg / 542 lbs |
| Fuel Capacity: | 11.5 L / 3.o US gal | 15 Litres / 4.0 US gal / 3.3 Imp gal | 15.5 Litres / 4.1 US gal |