2019 KTM SX Lineup First Look | Fast Facts

May 22, 2018

2019 KTM SX Two Stroke Lineup: 250 SX, 150 SX, 125 SX

The 2019 KTM SX lineup of two-stroke motocrossers has been updated. Many of the changes are shared among the three KTM SX motorcycles, with a few changes to the 250 SX not given to the 150 SX and 125 SX. Also, the 150 SX and 125 SX get unique changes as a pair.

Let’s go over the new 2019 KTM SX motorcycles for Supercross and Motocross racing.

Changes common to the 2019 KTM 250 SX, KTM 150 SX, and KTM 125 SX

Stiffer frame and triple clamp for more straight line stability
Updated suspension settings to enhance the stiffer frame
WP shock gets redesigned main piston
Longer subframe to support the rear fender
Longer axle slot in the swingarm to extend wheelbase for more stability
A new radiator design sits lower in the frame and improves cooling efficiency
New exhaust pipe with more compact dimensions
New muffler design extends service interval and reduces weight over 10 ounces
The muffler is now mounted on welded brackets
There are new settings for the 38mm flatslide carb to reflect the airbox and exhaust changes
Traction control and launch control settings revised for increased traction
New fuel tank with a 1.85-gallon capacity
New bodywork from KTM R&D and Kiska Design allows easier movement on the motorcycle
New seat designed to be more comfortable
New bar pad has improved mounting
New nipple design on wheels for reduced maintenance
New plastic plug-in side-stand doubles as fork spacer during transport

Changes to the 2019 KTM 250 SX

The engine position has been raised one degree for increased turning traction
New head stays reduce weight
The exhaust port is now machined for improved power valve precision
New intake snorkels increase airflow while directing dirt from the filter
The water pump casing has been redesigned for increased water flow

Changes to the 2019 KTM 150 SX and 125 SX.

New cylinder with an exhaust port is now machined for improved power valve precision
New diaphragm steel clutch is narrower and has a lighter action at the lever
The transmission is now manufactured by Pankl
The intermediate kickstarter gear has an improved seat