Sportbikes

2011Aprilia RS 125

37 fields on record

The 2011 Aprilia RS 125 is a sporty two-stroke designed for entry-level racers and enthusiastic learners seeking authentic performance. Its lightweight 125cc single-cylinder engine delivers punchy acceleration ideal for track days and spirited road riding. Best known for sharp handling and aggressive styling, it remains a favorite choice for riders progressing from smaller machines.

Capacity: 124.8 ccm
Engine: Single, two-stroke
Gearbox: 6-speed
Wet weight: 120.0 kg
Seat height: 805 mm
Power: 24.1 HP (18.0 kW)

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How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail3%

Cornering82%

City riding62%

Daily riding60%

Touring18%

Two-up18%

Track58%

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?

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Your height

Inseam (optional)

Units

At 805mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2011 Aprilia RS 125, with a cramped knee angle of around 70 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

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Full specifications

Engine

Capacity: 124.8 ccm
Power: 24.1 HP (18.0 kW)
Engine type: Single, two-stroke
Power/weight ratio: 0.2008 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
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: Multi-plate in oil bath.

Performance

Top speed: 120.0 km/h (74.6 mph)

Dimensions & weight

Wheelbase: 1345 mm
Overall length: 1955 mm
Overall width: 720 mm
Overall height: 1100 mm
Seat height: 805 mm
Wet weight: 120.0 kg
Fuel capacity: 14.00 litres
Dry weight: Not on record - add it

Chassis & suspension

Frame: Sloping twin-spar frame in thin wall box section cast aluminium, with reinforcement cross-ribbing.
Front suspension: Upside down hydraulic fork, 40 mm. Wheel travel 120 mm.
Rear suspension: Swingarm with asymmetric members in thin wall box section cast aluminium. Hydraulic monoshock with adjustable spring preload. Wheel travel 120 mm.
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

Color options: Red, white, black
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: October 2026.