Aprilia MX 125 - 2005 Specifications and Reviews

The 2005 Aprilia MX 125 is a lightweight enduro bike designed for young riders and beginners seeking off-road capability. Its liquid-cooled two-stroke engine delivers responsive performance for trail riding and competition. Known for agile handling and nimble maneuverability, it excels in technical terrain where compact size and low weight prove advantageous.

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General information

CategoryEnduro / offroad
Year2005
ModelAprilia MX 125
 
 

Engine and Transmission Specifications

Exhaust systemEmissions Euro 2
ClutchMultiple disks in oil bath.
Transmission type,final driveChain
Cooling systemLiquid
Lubrication systemSeparate mixer, with variable flow-rate pump.
IgnitionElectronic with capacitive discharged.
Fuel systemInjection. DellOrto PHBG 19 MS
Bore x stroke54.0 x 54.6 mm (2.1 x 2.1 inches)
Compression12.0:1
Engine typeSingle cylinder, two-stroke
Capacity:124.00 ccm (7.57 cubic inches)
 
 

Brakes, suspension, Frame and wheels

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, fitted on frictionless bushes, single hydraulic shock absorber with piggy back.
Front suspension travel260 mm (10.2 inches)
Front suspension40 mm upside-down telescopic fork.
Frame typeClosed-cradle split at the level of the exhaust, made from high tensile tubular steel

Physical measures and capacities

Wheelbase1,024 mm (40.3 inches)
Ground clearance250 mm (9.8 inches)
Seat height678 mm (26.7 inches) If adjustable, lowest setting.
Dry weight38.0 kg (83.8 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsMatrix black
StarterKick

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

2005 Aprilia MX 125 Rider Ergonomics Assessment

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Feet:

At 678mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2005 Aprilia MX 125, with a cramped knee angle of around 55 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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