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KTM SX 125 2025

KTM SX 125 2025
KTM SX 125 2025

There are very few sounds that can't be beaten. The crack of a soda can on a blistering hot day. The ping of the perfectly executed golf shot. And the scream of a 125 cc 2-stroke charging down a long straightaway. The 2025 KTM 125 SX takes its leads directly from the Factory Racing team and puts them to work like nothing else. Like the sound it makes, it cannot be beaten.

This motorcycle is designed, developed and produced in Austria.


Technical Details

Engine

  • Transmission6-speed
  • StarterElectric starter
  • Stroke54.5 mm
  • Bore54 mm
  • ClutchWet multi-disc DS clutch, Brembo hydraulics
  • Displacement124.8 cm³
  • EMSVitesco Technologies EMS
  • Design1-cylinder, 2-stroke engine
  • Fuel-mixture generationKeihin EFI, throttle body 39 mm

Chassis

  • Weight (without fuel)92.4 kg
  • Tank capacity (approx.)7.2 l
  • Wheelbase1493 mm
  • Front brake disc diameter260 mm
  • Rear brake disc diameter220 mm
  • Front brakeDisc brake
  • Rear brakeDisc brake
  • Chain520, Non-sealed
  • Frame designCentral double-cradle-type 25CrMo4 steel
  • Front suspensionWP XACT-USD (AER), Ø 48 mm
  • Ground clearance359 mm
  • HandlebarNeken, aluminium Ø 28/22 mm
  • Rear suspensionWP XACT Monoshock with linkage
  • Seat height958 mm
  • SilencerAluminium
  • Steering head angle63.9 °
  • Rear subframe designAluminum-reinforced polyamide
  • Suspension travel (front)310 mm
  • Suspension travel (rear)300 mm
  • WheelsSpoked wheels with aluminum rims

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