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Enduro Bikes

2021Aprilia RX 125

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The 2021 Aprilia RX 125 is a lightweight enduro bike designed for young riders and beginners exploring off-road terrain. Powered by a 124cc four-stroke single-cylinder engine producing 15 horsepower, it offers nimble handling and manageable performance for skill development. Known for its affordability and reliability, the RX 125 excels as an entry-level off-road machine that builds rider confidence on varied terrain.

Capacity: 124.2 ccm
Engine: Single, four-stroke
Gearbox: 6-speed
Dry weight: 124.0 kg
Seat height: 905 mm
Power: 15.0 HP (10.9 kW) @ 10500 RPM

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What’s new for the 2021 Aprilia RX 125

vs the 2020

Spec	2020	2021
Dry weight	120.0 kg (264.6 pounds)	124.0 kg (273.4 pounds)
Wet weight	124.0 kg (273.4 pounds)	134.0 kg (295.4 pounds)
Rear suspension	Hydraulic monoshock absorber with progressive link system.	High resistance steel swingarm. Hydraulic monoshock absorber with progressive link system.

Other years 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2025 2026

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail88%

Cornering55%

City riding45%

Daily riding40%

Touring20%

Two-up15%

Track10%

Best for: Designed primarily for light trail riding, green-laning, and off-road learning rather than speed or distance.
Built for: A nimble, playful small-capacity enduro that rewards momentum and finesse over outright power.
Not ideal for: Not suited for riders wanting high-speed touring, motorway cruising, or carrying a passenger in comfort.

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 905mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2021 Aprilia RX 125, with a cramped knee angle of around 80 degrees and an upright 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.

More bikes at over 900 mm — Sky High →

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Range and running costs

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Units

Currency

Fuel per litre

Riding a year

Based on the maker's published fuel consumption and tank size. Real-world figures depend on how and where you ride, and the last litres of a tank are reserve. Prices shown greyed are examples - type your own.

Full specifications

Engine

Capacity: 124.2 ccm
Power: 15.0 HP (10.9 kW) @ 10500 RPM
Torque: 10.9 Nm (1.1 kgf-m) @ 8250 RPM
Engine type: Single, four-stroke
Fuel consumption: 2.70 litres/100 km (37.0 km/l)
Power/weight ratio: 0.1210 HP/kg (dry)
Bore x stroke: 58.0 x 47.0 mm
Compression: 12.5:1
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: Electronic with CDI capacity discharge
Valves per cylinder: 4
Lubrication system: Wet sump

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: 1350 mm
Overall length: 2120 mm
Overall width: 835 mm
Overall height: 1180 mm
Seat height: 905 mm
Dry weight: 124.0 kg
Wet weight: 134.0 kg
Fuel capacity: 7.50 litres
Ground clearance: Not on record - add it

Chassis & suspension

Frame: Steel perimeter
Front suspension: Ø 41 mm telescopic upside down fork
Rear suspension: High resistance steel swingarm. Hydraulic monoshock absorber with progressive link system.
Front wheel travel: 240 mm
Rear wheel travel: 220 mm

Brakes & wheels

Front brakes: Single disc. Floating calliper. Front wheel only ABS.
Front brakes diameter: 300 mm
Rear brakes: Single disc. Floating calliper
Rear brakes diameter: 220 mm
ABS: Yes
Front tyre: 90/90-21
Rear tyre: 120/80-18

Other

Color options: Red Raceway

Specs last verified against published sources: October 2026.

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	1984	1994	2005	2015	2021	2026
Capacity	124 cc	124 cc	125 cc	124 cc	124 cc	124 cc
Dry weight	91 kg	91 kg	91 kg	116 kg	124 kg	124 kg
Seat height	925 mm	925 mm	925 mm	830 mm	905 mm	905 mm
Fuel capacity	8.5 L	8.5 L	12 L	10 L	7.5 L	7 L

Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.

Rider Reviews

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MotorcycleDB

The 2021 Aprilia RX 125 is an impressive lightweight motorcycle that offers a perfect balance of power and agility. With its 125cc engine, this bike delivers a thrilling riding experience while still being accessible for riders with lower levels of experience. The sleek design and high-quality components make the RX 125 a standout in the 125cc motorcycle category. Whether you're navigating city streets or hitting the trails, this bike excels in both urban and off-road environments.

Aprilia has once again proven their expertise in creating exceptional motorcycles with the 2021 RX 125. The combination of its powerful engine, advanced suspension, and responsive handling make it a top choice for riders looking for a versatile and fun motorcycle. The striking design and aggressive stance of the RX 125 will appeal to riders who want to make a statement with their motorcycle choice. Overall, the 2021 Aprilia RX 125 is a fantastic option for anyone in the market for a lightweight and capable motorcycle that doesn't compromise on performance.

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