Aprilia MX 125 - 2004 Specifications and Reviews

The 2004 Aprilia MX 125 is a lightweight enduro motorcycle designed for young and novice off-road riders seeking an accessible entry point into dirt biking. Its compact 124cc liquid-cooled engine delivers manageable power while the featherweight 35kg frame and low 890mm seat height ensure confidence-building handling on various terrain. Best known for combining affordability with genuine performance, the MX 125 remains an ideal starter bike for learning fundamental off-road riding skills.

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General information

CategoryEnduro / offroad
Year2004
ModelAprilia MX 125

Engine and Transmission Specifications

Transmission typefinal driveChain
Gearbox6-speed
Cooling systemLiquid
Fuel systemInjection
Bore x stroke54.0 x 54.6 mm (2.1 x 2.1 inches)
Compression12.0:1
Power15.00
Stroke2
Engine typeSingle cylinder
Capacity:124.00 ccm (7.57 cubic inches)
 
 

Physical measures and capacities

Wheelbase1,500 mm (59.1 inches)
Overall width890 mm (35.0 inches)
Overall length2,180 mm (85.8 inches)
Overall height1,205 mm (47.4 inches)
Seat height890 mm (35.0 inches) If adjustable, lowest setting.
Dry weight35.0 kg (77.2 pounds)
 
 

Aprilia MX 125 dimensions and frame

Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter320 mm (12.6 inches)
Front brakesSingle disc
Rear tyre dimensions150/60-17
Front tyre dimensions110/70-17
Rear suspension travel280 mm (11.0 inches)
Rear suspensionAluminium swinging fork with rectangular cross-section
Front suspension travel260 mm (10.2 inches)
Front suspension40 mm upside-down telescopic fork
Frame typeClosed-cradle split at the level of the exhaust

Speed and acceleration

Power/weight ratio0.4286 HP/kg

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsMatrix black
Reserve fuel capacity1.50 litres (0.40 gallons)
Fuel capacity11.00 litres (2.91 gallons)

Performance Profile & Rider Fit

Best For

Track25%
City50%
Cornering60%
Daily Riding35%
Touring20%
Passenger15%

Rider Profile

Best ForBest suited to riders who already have some two-stroke and small-bike experience, given the peaky power delivery and tall, lightly padded seat.
PurposeThis is a supermoto-style machine built for playful, aggressive street and light off-road riding rather than long-distance travel or outright top speed.
Rider FitThe 890 mm seat height and kick-start two-stroke engine demand a fairly active, fit rider comfortable standing on pegs and revving hard to stay in the power band.
CharacterIt has the character of a nimble, high-strung supermoto hooligan bike, eager to wheelie, stoppie, and carve tight corners rather than cruise smoothly.
Not Ideal ForIt is not a good fit for riders wanting a comfortable highway tourer, a passenger-friendly bike, or a low-maintenance four-stroke commuter.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2004 Aprilia MX 125 Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 890mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2004 Aprilia MX 125, with a cramped knee angle of around 80 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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