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Technical Specifications
2026 KTM 125 SX
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