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.

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: 7.2 L
• Weight (without fuel): 92 kg