Aprilia RS 125 (1999-02) vs Aprilia Atlantic 500 (2007-09) vs Aprilia ETX 125 (1997-98)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia |
| Model: | RS 125 | Atlantic 500 | ETX 125 |
| Years: | 1999-02 | 2007-09 | 1997-98 |
| Engine: | Single cylinder, two stroke, reed valves induction | Four stroke, single cylinder, SOHC | Two stroke single cylinder with laminar suction and separate lubrication |
| Capacity: | 125 cc / 7.6 cu in | 460 cc / 28.1 in | 124.8 cc / 7.6 cu in |
| Bore x Stroke: | 54 x 54.5mm | 92 x 69 mm | 54 x 54.5 mm |
| Compression Ratio: | 14.5:1 | 10.5:1 | 15.5:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled |
| Induction: | Dell'Orto VHSB 34LD | Electronic fuel injection | Dell'Orto PHBH 28 carburetor |
| Starting: | Electric | Electric | Kick |
| Transmission: | 6 Speed | Automatic with continuous variator | 6 Speed |
| Final Drive: | Chain | V-belt | Chain |
| Front Suspension: | Upside-down forks, Ø 40mm | Hydraulic fork, Ø35 mm | Hydraulically operated telescopic fork |
| Front Wheel Travel: | 120 mm / 4.7 in | 105 mm / 4.1 in | 232 mm / 9.1 in |
| Rear Suspension: | Monoshock | Engine acting as swingarm. Two gas filled shock absorbers with 5 position spring preload adjustment. | Hydraulic adjustable mono-shock |
| Rear Wheel Travel: | 120 mm / 4.7 in | 90 mm / 3.5 in | 101.5 mm / 4.0 in |
| Front Brakes: | Single 320 mm discs, 4 piston caliper | 2 x Ø260 mm disc, 3 piston calipers | Single disc, Ø250 mm |
| Rear Brakes: | Single 240 mm disc, 2 piston caliper | Single Ø220 mm disc, 2 piston caliper | Single disc, Ø220 mm |
| Front Tyre: | 110/70-17 | 120/70 -14 | 90/90 - 21 54R or 54S or 80/100 - 21 51R |
| Rear Tyre: | 150/60-17 | 140/60 -14 | 120/80 - 18 62S or 120/90 - 18 65R or 65P |
| Fuel Capacity: | 11.5 L / 3.0 US gal | 15 Litres / 4.0 US gal | 11 Litres / 2.9 US gal |