Aprilia RX 125R (1998-00) vs Kawasaki GPZ 305 (1984-) vs Yamaha YZF 1000 R1 (2011)
Comparison technical specifications
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| Make: | Aprilia | Kawasaki | Yamaha |
| Model: | RX 125R | GPZ 305 | YZF 1000 R1 |
| Years: | 1998-00 | 1984- | 2011 |
| Engine: | Single cylinder, two stroke | Four stroke Parallel twin, SOHC, 2 valves per cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 124.8 cc / 7.6 cu in | 306 cc / 18.7 cu-in | 998 cc / 60.9 cu-in |
| Bore x Stroke: | 54 x 54.5 mm | 61.0 x 52.4 mm | 78 X 52.2 mm |
| Compression Ratio: | 12.5:1 | 9.7:1 | 12.8:1 |
| Induction: | Dell'Orto Ø 34 mm carburetor | 2x 32mm Keihin CVi carburetors | Mikuni 45mm throttle body FI |
| Starting: | Electric and kick | Electric | Electric |
| Max Power: | 23.1 kW / 31.0 hp @ 10800 rpm | 19.9 kW / 26.6 hp @ 10000 rpm | 133.9 kW / 182 hp @ 12500 rpm |
| Max Torque: | 21.6 Nm / 2.2 kgf-m / 15.9 lb-ft @ 10500 rpm | 25.5 Nm / 18.8 lb·ft @ 8500 rpm | 115.5 Nm / 11.8 kgf-m @ 10000 rpm |
| Transmission: | 6 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | Belt | "O" ring chain |
| Front Suspension: | Upside down fork | Telescopic forks | 43mm inverted telescopic fork w/adjustable preload, compression damping, rebound damping; |
| Rear Suspension: | Swinging fork swingarm with single shock absorber | Swing arm | Single shock w/piggyback reservoir; adjustable for hi-/lo-speed compression damping, rebound damping, spring preload, |
| Front Brakes: | Single Ø 250 mm disc | 2x disc | 2x 310mm discs 6 piston calipers |
| Rear Brakes: | Single Ø 220mm disc | Drum | Single 220mm disc 1 piston caliper |
| Front Tyre: | 90/90-21 | 90/90-18 | 120/70 ZR17 |
| Rear Tyre: | 120/80-19 | 110/80-18 | 190/55 ZR17 |
| Dry Weight: | 105 kg / 231 lbs | 147 kg / 324 lbs | 177 kg / 389.4 lb |
| Wet Weight: | 122 kg / 269 lbs | 160.6 kg / 354 lbs | 206 kg / 454 lb |
| Fuel Capacity: | 11.5 L / 3.o US gal | 16.5 Litres / 4.3 US gal | 18 Litres / 4.8 gal |
| Top Speed: | 128.0 km/h / 79.5 mph | 162 km/h / 101 mph | 280.9 km/h |