Sportbikes
2003Aprilia RS 125
37 fields on record
The 2003 Aprilia RS 125 is a two-stroke race replica, one of the fastest 125s of its time. Its liquid-cooled 125cc single makes 28 hp at 10,500 rpm in full-power form through a six-speed gearbox and chain; a learner-restricted version was also sold. An 805 mm seat, 143 kg wet weight and 14-litre tank complete the package.
- Capacity
- 125.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 114.0 kg
- Seat height
- 805 mm
- Power
- 28.0 HP (20.9 kW) @ 10500 RPM
What’s new for the 2003 Aprilia RS 125
vs the 2002| Spec | 2002 | 2003 |
|---|---|---|
| Power | 34.0 HP (25.4 kW) @ 11000 RPM | 28.0 HP (20.9 kW) @ 10500 RPM |
Other years
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- A pint-sized track-styled sportbike built for spirited backroad riding, carving corners, commuting, and learning proper sport riding skills.
- Built for
- A miniature superbike with real GP-inspired attitude - eager, revvy single that must be worked hard, delivering big-bike thrills at modest speeds.
- Not ideal for
- Not for those wanting outright speed, relaxed touring comfort, two-up practicality, off-road use, or a laid-back upright commuter.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 125.0 ccm
- Power
- 28.0 HP (20.9 kW) @ 10500 RPM
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.2456 HP/kg (dry)
- Bore x stroke
- 54.0 x 54.5 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Electric
- Ignition
- CDI capacitor discharge electronic
- Lubrication system
- Separate mixing with variable displacement volumetric pump
- Torque
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multiple disk in oil bath
Performance
- Top speed
- 120.0 km/h (74.6 mph)
Dimensions & weight
- Wheelbase
- 1345 mm
- Overall length
- 1988 mm
- Overall width
- 615 mm
- Overall height
- 1095 mm
- Seat height
- 805 mm
- Dry weight
- 114.0 kg
- Wet weight
- 143.0 kg
- Fuel capacity
- 14.00 litres
Chassis & suspension
- Frame
- Cast aluminium, reinforced box section, sloping twin-spar frame.
- Front suspension
- Upside-down hydraulic action telescopic fork, 40 mm inners.
- Rear suspension
- Cast aluminium swing-arm with asymmetrical members, thin walled structural shell, single hydraulic monoshock, adjustable spring preload.
- Front wheel travel
- 120 mm
- Rear wheel travel
- 120 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 320 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 110/70-17
- Rear tyre
- 150/60-17
Other
- Comments
- Listed power is the full-power version; a learner-restricted version rated 11 kW (15 hp) was also sold.
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1997 | 2003 | 2004 | 2011 | 2020 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc | 124 cc |
| Dry weight | 117 kg | 114 kg | — | — | 122 kg | — |
| Seat height | 780 mm | 805 mm | 805 mm | 805 mm | 820 mm | 820 mm |
| Fuel capacity | 13 L | 14 L | 14 L | 14 L | 14.5 L | 14.5 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Aprilia RS 125?
The 2003 Aprilia RS 125 has a Capacity of 125.0 ccm (7.63 cubic inches).
What engine power does the Aprilia RS 125 have?
The 2003 Aprilia RS 125 has a Power of 28.0 HP (20.9 kW) @ 10500 RPM.
How many gears does the Aprilia RS 125 have?
The 2003 Aprilia RS 125 has a Gearbox of 6-speed.
How much does the Aprilia RS 125 weigh?
The 2003 Aprilia RS 125 has a Dry weight of 114.0 kg (251.3 pounds).
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