KTM 125 EXC - 2003 Specifications and Reviews

The 2003 KTM 125 EXC is a lightweight enduro machine designed for amateur and intermediate off-road riders seeking versatility across varied terrain. Its nimble 101.4 kg frame and liquid-cooled single-cylinder engine deliver responsive power ideal for trail riding and beginner-level competition. Known for exceptional maneuverability and accessibility, it remains a popular choice for those stepping up to serious off-road riding.

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General information

CategoryEnduro / offroad
Year2003
ModelKTM 125 EXC

Engine and Transmission Specifications

Transmission typefinal driveChain
Gearbox6-speed
Cooling systemLiquid
Fuel systemCarburettor
Bore x stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Stroke2
Engine typeSingle cylinder
Capacity:124.80 ccm (7.62 cubic inches)
 
 

Physical measures and capacities

Wheelbase1,461 mm (57.5 inches)
Ground clearance390 mm (15.4 inches)
Seat height925 mm (36.4 inches) If adjustable, lowest setting.
Dry weight101.4 kg (223.5 pounds)
 
 

KTM 125 EXC dimensions and frame

Rear tyre dimensions120/90-18
Front tyre dimensions90/90-21
Rear suspension travel335 mm (13.2 inches)
Rear suspensionWP-PDS-shock absorber
Front suspension travel300 mm (11.8 inches)
Front suspensionWP-USD 48 MA

Speed and acceleration

Fuel capacity9.00 litres (2.38 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track20%
City15%
Cornering55%
Daily Riding10%
Touring15%
Passenger5%

Rider Profile

Best ForThis is a demanding, race-bred two-stroke enduro best suited to experienced off-road riders who understand peaky power delivery and no electronic aids.
PurposeBuilt purely for competitive enduro and technical off-road riding, not for street use or general transportation.
Rider FitIts extremely light dry weight and tall seat height reward an agile, fit rider who can stand, shift body weight, and manhandle the bike over obstacles.
CharacterA raw, high-strung two-stroke with sharp, explosive power and razor-quick handling that thrives on tight trails and technical terrain.
Not Ideal ForIt is not suitable for daily commuting, highway touring, carrying a passenger, or riders seeking comfort and predictability.

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

Rider Fit Visualizer

2003 KTM 125 EXC Rider Ergonomics Assessment

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

Feet:

At 925mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2003 KTM 125 EXC, 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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