Sportbikes
2004Aprilia RS 125
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The 2004 Aprilia RS 125 is a lightweight sport bike engineered for new and young riders seeking an accessible entry point into sportbike riding. Its 125cc liquid-cooled single-cylinder engine delivers 28 horsepower through a six-speed chain-driven transmission, offering responsive performance and maneuverability. The RS 125 is best known for combining affordable entry-level pricing with genuine sports styling and handling characteristics.
- Capacity
- 125.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Wet weight
- 143.0 kg
- Seat height
- 805 mm
- Power
- 28.0 HP (21.0 kW) @ 10500 RPM
What’s new for the 2004 Aprilia RS 125
vs the 2003| Spec | 2003 | 2004 |
|---|---|---|
| Dry weight | 114.0 kg (251.3 pounds) | not listed |
| Front brakes | Single disc | Double disc |
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 (21.0 kW) @ 10500 RPM
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.1958 HP/kg (wet)
- 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
- Wet weight
- 143.0 kg
- Fuel capacity
- 14.00 litres
- Dry weight
- Not on record - add it
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
- Double disc
- Front brakes diameter
- 320 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 110/70-17
- Rear tyre
- 110/70-17
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 | 2004 | 2011 | 2020 | 2027 |
|---|---|---|---|---|---|
| Capacity | 125 cc | 125 cc | 125 cc | 125 cc | 124 cc |
| Dry weight | 117 kg | — | — | 122 kg | — |
| Seat height | 780 mm | 805 mm | 805 mm | 820 mm | 820 mm |
| Fuel capacity | 13 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 2004 Aprilia RS 125 has a Capacity of 125.0 ccm (7.63 cubic inches).
What engine power does the Aprilia RS 125 have?
The 2004 Aprilia RS 125 has a Power of 28.0 HP (21.0 kW) @ 10500 RPM.
How many gears does the Aprilia RS 125 have?
The 2004 Aprilia RS 125 has a Gearbox of 6-speed.
How much does the Aprilia RS 125 weigh?
The 2004 Aprilia RS 125 has a Wet weight of 143.0 kg (315.3 pounds).
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