2026 KTM 125 SX

FULL-SCREAM AHEAD
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 full throttle. The KTM 125 SX takes its leads directly from the KTM Factory Racing team for pure performance, pure results. Like the sound it makes, you won't forget it.
 
Technical Specifications:
Engine
Design: 1-cylinder, 2-stroke engine
Displacement: 124.8 cm³
Transmission: 6-speed
Fuel-mixture generation: Keihin EFI, throttle body 39 mm
EMS: Vitesco Technologies EMS
Clutch primary drive teeth: 73
Primary drive: 23:73
Clutch: Wet multi-disc DS clutch, Brembo hydraulics
Clutch type: DS multi-disc wet clutch
Clutch operation: Brembo hydraulics
Engine cylinder: Single cylinder
Engine stroke: 2-Stroke
 
Chassis
Frame design: Central double-cradle-type 25CrMo4 steel
Front brake: Disc brake
Rear brake: Disc brake
Rear subframe design: Aluminum-reinforced polyamide
Chain: 520, Non-sealed
 
Suspension
Front suspension: WP XACT-USD (AER), Ø 48 mm
Rear suspension: WP XACT Monoshock with linkage
Suspension travel (front): 310 mm
Suspension travel (rear): 300 mm
Front suspension adjustment: Compression (high and low speed), rebound
Rear suspension setting: Compression and rebound adjustable
 
Dimensions
Seat height: 958 mm
Ground clearance: 359 mm
Tank capacity (approx.): 7.2 l
Weight (without fuel): 92 kg