Aprilia RX 125 R (2007-09) vs Suzuki GSX 550EF (1984-86)
Comparison technical specifications
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| Make: | Aprilia | Suzuki |
| Model: | RX 125 R | GSX 550EF |
| Years: | 2007-09 | 1984-86 |
| Engine: | Single cylinder two stroke. Aluminium cylinder with Nikasil coated liner. Read valve intake. Separate mixing. Homologated to Euro 3 standard. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 124.8 cc / 7.6 cu in | 572 cc / 34.9 cu in |
| Bore x Stroke: | 54 x 54.5 mm | 60 x 50.6 mm |
| Compression Ratio: | 12.5:1 | 9.8:1 |
| Cooling System: | Liquid cooled | Air/oil cooled |
| Induction: | Dell’Orto VHST 28 | 2 x 32 mm Mikuni carburetors |
| Ignition: | Electronic CDI | Transistorized |
| Starting: | Electric and kick | Electric |
| Transmission: | 6 Speed | 6 Speed constant mesh |
| Final Drive: | Chain | #50 (530) Chain, 112 links, O-ring sealed |
| Frame: | High strength steel frame with double trellis beam and double cradle. Separate seat frame. | Tubular steel, double cradle |
| Front Suspension: | Upside down telescopic fork, Ø 40 mm. | Posi Damp Fork System, telescopic forks, coil spring, oil dampened |
| Rear Suspension: | Steel swingarm. Hydraulic monoshock with piggy back cylinder. | Full floating suspension system, spring preload, fully adjustable |
| Front Brakes: | Single Ø 260 mm disc. 2 piston caliper | 2 x 260 mm discs, 2 piston caliper |
| Rear Brakes: | Single Ø 220 mm disc, 1 piston caliper | Single 250 mm disc, 2 piston caliper |
| Front Tyre: | 90/90-21 | 100/90-16 54H |
| Rear Tyre: | 120/90 18 | 110/90-18 61H |
| Fuel Capacity: | 10 liters / 2.6 US gal | 18 Litres / 4.8 US gal / 4.0 Imp gal |
| Consumption Average: | 5.4 L/100 km / 18.4 km/l / 43 US mpg | 4.9 L/100 km / 20.4 km/l / US 48 mpg / 57.6 Imp mpg |
| Standing ¼ Mile: | 20.3 sec | 12.8 sec |
| Top Speed: | 185 km/h / 115 mph | 196 km/h / 122 mph |