2025 KTM 125SX

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.

TRANSMISSION 6-speed
STARTER Electric starter
STROKE 54.5 mm
BORE 54 mm
CLUTCH Wet multi-disc DS clutch, Brembo hydraulics
DISPLACEMENT 124.8 cm³
EMS Vitesco Technologies EMS
DESIGN 1-cylinder, 2-stroke engine
CHASSIS
WEIGHT (WITHOUT FUEL) 92.4 kg
TANK CAPACITY (APPROX.) 7.2 l
FRONT BRAKE DISC DIAMETER 260 mm
REAR BRAKE DISC DIAMETER 220 mm
FRONT BRAKE Disc brake
REAR BRAKE Disc brake
CHAIN 520, Non-sealed
FRAME DESIGN Central double-cradle-type 25CrMo4 steel
FRONT SUSPENSION WP XACT-USD (AER), Ø 48 mm
GROUND CLEARANCE 359 mm
REAR SUSPENSION WP XACT Monoshock with linkage
SEAT HEIGHT 958 mm
STEERING HEAD ANGLE 63.9 °
SUSPENSION TRAVEL (FRONT) 310 mm
SUSPENSION TRAVEL (REAR) 300 mm

d30702
stock kt
125 125sx sx-125 125-sx