Aprilia RX 125 R (2007-09) vs Aprilia SMV 900 Dorsoduro (2017) vs Aprilia Scarabeo 200 (2008-12) vs Aprilia RX 125 (1983-84)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia | Aprilia |
| Model: | RX 125 R | SMV 900 Dorsoduro | Scarabeo 200 | RX 125 |
| Years: | 2007-09 | 2017 | 2008-12 | 1983-84 |
| Engine: | Single cylinder two stroke. Aluminium cylinder with Nikasil coated liner. Read valve intake. Separate mixing. Homologated to Euro 3 standard. | Four stroke, longitudinal 90°V twin, DOHC, with mixed gear/chain timing system,4 valves per cylinder | Four stroke, single cylinder, DOHC, 4 valves per cylinder | Single cylinder, two stroke |
| Capacity: | 124.8 cc / 7.6 cu in | 896.1 cc / 54.6 cu-in | 180.8 cc / 11.0 cu in | 124.8 cc / 7.6 cu in |
| Bore x Stroke: | 54 x 54.5 mm | 92 x 67.4 mm | 62 x 58.4 mm | 54 x 54.5 mm |
| Compression Ratio: | 12.5:1 | 11.0:1 | 12:1 | 11.5:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Transmission: | 6 Speed | 6 Speed | Automatic with continuous variator | 6 Speed |
| Final Drive: | Chain | Chain | V-belt | Chain |
| Front Suspension: | Upside down telescopic fork, Ø 40 mm. | Upside-down fork, stanchions Æ 41 mm. Adjustable hydraulic rebound damping and spring preload. | Hydraulic fork, sleeve Ø35mm | Hydraulic telescopic fork |
| Rear Suspension: | Steel swingarm. Hydraulic monoshock with piggy back cylinder. | Aluminum alloy swingarm. Hydraulic shock absorber with adjustable extension and spring preload | Engine functions as swinging fork swingarm, linked to the frame by dual connecting rods and two radial silent blocks. Two double-action gas shock absorbers with preload adjustment. | Swingarm with single shock absorber |
| Front Brakes: | Single Ø 260 mm disc. 2 piston caliper | 2 x 320 mm discs, stainless floating discs. Radial, four-piston callipers. Metal braided brake hose | Single Ø260 mm stainless steel disc, 3 piston floating caliper, integrated braking system | Drum |
| Rear Brakes: | Single Ø 220 mm disc, 1 piston caliper | Single 240 mm disc, Single piston calliper. Metal braided line. | Single Ø220 mm stainless steel disc, 2 piston caliper, integrated braking system | Drum |
| Front Tyre: | 90/90-21 | 120/70 ZR17 | 110/80-16 | 3.00-21 |
| Rear Tyre: | 120/90 18 | 180/55 ZR17 | 120/80-16 | 4.00-18 |
| Fuel Capacity: | 10 liters / 2.6 US gal | 12 Litres / 3.17 US gal | 8.1 L / 2.1 US gal | 8.5 L / 2.2 US gal |