Overview

2027 KTM SX 125

Motorcycle

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.

Starting at $8,449 MSRP

Manufacturer suggested retail price. Does not include dealer fees, tax, title, or registration.

Request Info

View Inventory

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

Primary drive

23:73

Clutch

Wet multi-disc DS clutch, Brembo hydraulics

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 adjustment

Compression and rebound adjustable

Dimensions

Seat height

958 mm

Ground clearance

359 mm

Tank capacity (approx.)

7.2 l

Weight (without fuel)

92 kg

Easy Suspension Adjustment

As always, the suspension boasts an easy tool-free setup at both ends, ensuring you chase down the podium in total control. On the rear, a hand-adjustable dual compression option allows riders to adjust high- and low-speed settings in a matter of seconds. The forks on the front end are also easily modified thanks to hand-adjustable clickers on the bottom of the fork shoe and top cap.

Electronic Fuel Injection

Pre-mix gets a remix across the 2-stroke KTM SX range, with Electronic Fuel Injection setting the standard. Now there's no setup pre-race. And thanks to the Keihin EFI and reed valve case design, you can be guaranteed of laying down optimal power at any altitude, all of the time.

Electric Start

Picture this; You're 7 laps into an absolute ripper of a race. You miss your line and end up stalling in a deep rut. But don't sweat it. All you do is press the starter button and you blast off again to take the flag. This is the reality on the KTM SX models. Thanks to a 12.8V 2 Ah lithium ion battery placed under the rider's seat, a high-quality starter and pickup, and super robust design, the only thing you'll be kicking - is ass.

Serviceability

The KTM SX and SX-F range is engineered and designed to provide riders with easy-to-access service parts, as well as suspension adjustability. This permits faster trackside and off-season maintenance, as well as simplifying motocross for novice riders without pit crews.

2027 KTM SX 125

FULL-SCREAM AHEAD

Specs & Features

My Vehicles

Save your vehicles.

Have your vehicles with you

Recently Viewed Vehicles

Compare saved vehicles