Suzuki GSX-R250 (1987) vs Aprilia RX 125R (1994-95) vs Suzuki GSX 400F Katana (1981)
Comparison technical specifications
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| Make: | Suzuki | Aprilia | Suzuki |
| Model: | GSX-R250 | RX 125R | GSX 400F Katana |
| Years: | 1987 | 1994-95 | 1981 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Single cylinder, two stroke | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 248 cc / 15.1 cu in | 124.8 cc / 7.6 cu in | 398 cc / 24.3 cu in |
| Bore x Stroke: | 49 x 33 mm | 54 x 54.5 mm | 53 x 45.2 mm |
| Compression Ratio: | 12.5:1 | 12.5:1 | 10.2:1 |
| Induction: | Single carburetor | Dell'Orto Ø 34 mm carburetor | 4 x Mikuni BS26SS carburetors |
| Starting: | Electric | Electric and kick | Electric |
| Max Power: | 33.6 kW / 45 hp @ 14000 rpm | 23.1 kW / 31.0 hp @ 10800 rpm | 30.8 kW / 41.3 hp @ 10500 rpm |
| Max Torque: | 24 Nm / 2.5 kgf-m /17.7 lb-ft @ 10500 rpm | 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 |
| Transmission: | 6 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain, DAIDO DID50UB, 104 links |
| Front Suspension: | Telescopic forks | Upside down fork | Telescopic fork, oil dampened |
| Rear Suspension: | Full floater | Swinging fork swingarm with single shock absorber | Swingarm, dual shocks, oil dampened, spring 5-way adjustable |
| Front Brakes: | 2 x 300 mm Discs, 2 piston calipers | Single Ø 250 mm disc | 2 x Discs |
| Rear Brakes: | Single 240mm disc, 1 piston caliper | Single Ø 220mm disc | Single disc |
| Front Tyre: | 110/80-R17 | 90/90-21 | 3.25-S19 4PR |
| Rear Tyre: | 130/70-R17 | 120/80-19 | 3.75-S18 4PR |
| Dry Weight: | 138 kg / 304 lbs | 105 kg / 231 lbs | 179 kg / 395 lbs |
| Fuel Capacity: | 16 Litres / 4.2 US gal / 3.5 Imp gal | 11.5 L / 3.o US gal | 15 Litres / 4.0 US gal / 3.3 Imp gal |
| Top Speed: | 180 km/h / 112 mph | 128.0 km/h / 79.5 mph | 170 km/h / 106 mph |