2015 KTM 125 SX

KTM 125 SX 2015


2015 KTM 125 SX specifications, pictures, reviews and rating

KTM's profilation of this bike
The 125 SX has long since established itself as the undisputed top dog above all in junior race series and as a springboard to the professional leagues. Powered by a high-performance 2-stroke engine with exhaust control system and 6-speed transmission, the 125 SX has been further improved for the 2015 model year, ensuring it will maintain its popularity with young champions in future.

General information
Model name KTM 125 SX
Year model 2015
Type Cross / motocross
Rating 2.7  Check out the detailed rating of off-road capabilities, engine performance, maintenance cost, etc. Compare with any other bike.
Engine and transmission
Engine size 124.8 ccm (7.62 cubic inches)
Type of engine Single cylinder, two-stroke
Engine details Reed intake.
Bore x stroke 54.0 x 54.5 mm (2.1 x 2.1 inches)
Fuel system Carburettor
Ignition Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
Cooling system Liquid
Gearbox 6-speed
Transmission type Chain (final drive)
Clutch Wet multi-disc clutch, hydraulically operated
Driveline 13:50. Primary drive: 23:73.
Chassis, suspension, brakes and wheels
Frame type Central tube frame made of chrome molybdenum steel tubing
Rake (fork angle) 26.5°
Front suspension WP  Suspension Up Side Down 4860 MXMA CC
Front wheel travel 300 mm (11.8 inches)
Rear suspension WP  Suspension 5018 BAVP DCC
Rear wheel travel 317 mm (12.5 inches)
Front brakes Single disc. Brake calipers on floating bearings
Diameter 260 mm (10.2 inches)
Rear brakes Single disc. Brake calipers on floating bearings
Diameter 220 mm (8.7 inches)
Physical measures and capacities
Dry weight 90.8 kg (200.2 pounds)
Seat height 992 mm (39.1 inches) If adjustable, lowest setting.
Ground clearance 395 mm (15.6 inches)
Wheelbase 1480 mm (58.3 inches)
Fuel capacity 7.50 litres (1.98 US gallons)
Other specifications
Color options Orange/black
Starter Kick
Update specsReport missing specs or required updates.
Further information
Insurance costsCompare US insurance quotes from the nation's top providers.
Parts finder Check out our overview of motorcycle webshops at Bikez.info.
MaintenanceFind parts, fluids. filters, maintenance tools and service manuals at Amazon.com.
Ask questionsJoin the 15 KTM 125 SX discussion group or the general KTM discussion group.
Related bikesList related bikes for comparison of specs.
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Technical issues with this bike

Bikez.com has a discussion group for every motorcycle. Here you may find answers to common questions about the model. If you do not find what you are looking for, you can ask questions. Try out the 2015 KTM 125 SX discussion forum. You can sign up for e-mail notifications when other users answer you. If you have information about any technical issue related to this motorcycle, please leave a comment for other riders.


Rating sample for this KTM bike
Engine performance for the 2015 KTM 125 SX:

Vote scale
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