125 SX 2020
KICKSTART YOUR RACING CAREER
The KTM 125 SX is the most compact and lightweight of the full-size bikes and delivers a confidence-inspiring ride like no other. A lightweight chassis teams up with the most competitive 125cc 2-stroke engine in its class, delivering superior agility and power to fulfil the demands of any young adrenaline seeker. This 2-stroke screamer is the ultimate entry point into the pro ranks and a sure-fire way to add to the trophy collection.
Technical details
Engine
Displacement
124.8 cm³
Design
1-cylinder, 2-stroke engine
Bore
54 mm
Stroke
54.5 mm
Starter
Kickstarter
Transmission
6-speed
Clutch
Multi-plate clutch, Brembo hydraulics
EMS
Kokusan
Chassis
Frame design
Central double-cradle-type 25CrMo4 steel
Front suspension
WP XACT-USD, Ø 48 mm
Rear suspension
WP XACT Monoshock with linkage
Suspension travel (front)
310 mm
Suspension travel (rear)
300 mm
Front brake
Disc brake
Rear brake
Disc brake
Front brake disc diameter
260 mm
Rear brake disc diameter
220 mm
Chain
5/8 x 1/4"
Steering head angle
63.9 °