At the heart of the 2012 KTM 125 EXC enduro - offroad motorcycle, KTM utilizes a 124.8 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke layout. Internal engine geometry specifies a bore and stroke of 54.0 x 54.5 mm (2.1 x 2.1 inches) with a 12.5:1 compression ratio.
On the scales, the 125 EXC measures 95 kg (209 lbs) dry. Rider ergonomics and chassis geometry center around a 960 mm (37.8 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,471 mm (57.9 in) wheelbase engineered for balanced agility and highway composure. The 9.5-liter (2.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's KTM archive, this model family spans 16 indexed model years from 2000 to 2016, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
960 mm (37.8 in)
Engine
Displacement124.8 ccm (7.62 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsReed intake and exhaust control
Compression12.5:1
Bore x Stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel SystemCarburettor. Keihin PWK 36 S AG
IgnitionContactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
LubricationMixture oil lubrication 1:60
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet mDouble disk clutch / hydraulically operated
Driveline14:50 (13:50) Primary gear 23:73.
Chassis
Frame TypeCentral tube frame made of chrome molybdenum steel tubing
Rake26.5°
Front SuspensionWP Suspension Up Side Down 4860 MXMA PA
Front Travel300 mm (11.8 inches)
Rear SuspensionWP Suspension PDS 5018 DCC
Rear Travel335 mm (13.2 inches)
Wheelbase1471 mm (57.9 inches)
Ground Clearance355 mm (14.0 inches)
Wheels & Brakes
Front Tyre90/90-21
Rear Tyre120/90-18
Front BrakesSingle disc
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Dry Weight95.0 kg (209.4 pounds)
Seat Height960 mm (37.8 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
