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141618_KTM 150 SX 90de right MY2017 studio4
141617_KTM 150 SX 90de left MY2017studio3
141618_KTM 150 SX 90de right MY2017 studio4
141619_KTM 150 SX left rear MY2017 studio2


Utsalgspris kr67.900


On a KTM 150 SX the fun really does never end. With the agility of a 125 and enough muscle to take the fight to the 250cm3 4-strokes, this bike punches well above its weight. Its snarling engine sets benchmarks in terms of power and torque, rocketing that state-of-the-art chassis miles ahead of the competition. As of now, victory could easily smell of 2-strokes.


The engine of the 150 SX was developed with

the latest know-how and state-of-the-art

technology. That’s the only way to craft class-

leading power all across the rev range.  This is

the lightest and most compact 150cm3

firecracker you’ll find. So prepare for

surprisingly fast lap times and baffling

rideability. As this motorcycle shares many of

its key components with the class-leading 125

SX, the cylinder, head and piston unit can now

also be fitted on a 125cm3 engine base

converting it to a 150 SX without replacing the

crankshaft. Buy one, get one free. Nearly.


This compact cylinder with a 58mm bore

features a cutting-edge power valve unit with a

sophisticated mechanism for the lateral support

exhaust ports. Matched to a twin-component

cylinder head, it is KTM’s secret to all-round

grunt. The layout of the water jackets in the

cylinder and head guarantees efficient heat

dissipation when the going gets tough.


For the latest engine generation the KTM

engineers designed lightweight die-cast engine

cases featuring a high crankshaft position

located close to the center of gravity, which

results in optimal mass centralization and

outstanding rideability. In addition, the engine

body is extremely compact, while still able to

house an optional electric starter.


As of model year 2017, all KTM 2-stroke

models are fitted with new MIKUNI TMX

carburetors, replacing the Keihin products. This

38mm flat slide carb lives to provide smooth

and controllable power all the way up to the

limiter. And it’s less sensitive to different

altitudes and temperatures, so you can pin it

wherever, whenever.


This reliable piece of engineering has been

skillfully balanced to guarantee minimal

vibrations. In its latest form, it allows a

decrease of the displacement to 125cm3 just

by replacing cylinder, piston and head. There’s

no more need to change the crankshaft.

Two-in-one in no time.


A robust 6-speed transmission was designed

specifically for the small 2-stroke engine, its

gear ratios perfectly in sync with the 150’s

power band. The latest production technologies

allowed for compact dimensions and minimal

weight. Keeping safety in mind, an advanced

´No Dirt´ gear lever design prevents muck from

blocking the joint. Because even dirt lovers

hate mud when it’s in the wrong places.


The engineers meticulously tuned the

expansion chamber for maximum torque and

power, so this little screamer is as tough as it is strong.


The main target for the KTM engineers when developing the SX models was a

massive weight reduction compared to the previous generation. The result:

the current SX models are the slimmest, lightest bikes in the competition.      


The airbox design offers maximum protection of the air filter against soiling,

while ensuring maximum airflow. The large twin-air filter is mounted in a stiff cage,

which at the same time holds the system in place. This design is so simple,

you could still pop a fresh one in with a face full of mud. Without tools. In seconds.    


The cast aluminum design offers low weight and a perfect flex behavior.

The single-component casting process eliminates any inconsistencies

and inherent weak points created by welding. It’s better looking too.  


Tailored to meet the needs of the world’s fastest backsides, this durable seat offers

great comfort. For MY2017, a new cover pampers its riders even more

with better feel and grip.      



The high-tech, lightweight chrome-moly steel frame has a knack for easy handling, outlandish

rideability, precise cornering and excellent stability. You can also count on high torsional rigidity

and low longitudinal stiffness. This results in better absorption of the energy created from

the front and rear suspension, sucking up jumps and bumps. In short: more comfort and

less rider fatigue. Laterally attached, lightweight  engine head stays (the connection between

cylinder head and frame) contribute to  precise cornering and a reduced vibration level.

The engineers were able to pull off all that, while making their frame a big fat kilogram

lighter than that of the lightest competitor on the market. In addition, it is easier to maintain,

easier to work on and supplies more space for the tank and other components.

The bike also features an extra-light subframe made of stable aluminum profiles,

which tiptoes the scales at less than 900g.      



A lightweight polyethylene tank with a capacity of 7.0 liters of juice. The filler cap has an

inside thread, which makes for easy and reliable closure.        


KTM’s proven cooling system routes the coolant from the cylinder head through the frame triangle,

directly to aluminum radiators made by WP. Due to flow optimized internal circulation and CFD-calculated

air ventilation, the system is superbly efficient. In addition, well thought-out radiator

guards integrated in the front part of the spoilers provide protection in

case of crashes. Which is also pretty cool.  


Sophisticated ´No Dirt´ footpegs prevent smudging up the pegs, even when digging in deep ruts.

Looking for a higher riding position? Then just mount the footpegs of the MY2017 EXC

models, which are 6mm higher than the SX versions.      



KTM engineers sure know how to handle handlebars. This tapered one, made of high-strength

aluminum by NEKEN, is fixed in damped rubber mountings and has two different positions.

From MY2017 onwards, the lower handlebar clamps are separated, while on the upper

side a new bridge-type clamp guarantees more torsional stiffness. It’s also easier to

replace the bar in case it gets twisted in a nasty crash. An ODI volcanized grip sits on the

right, while on the left side of the bar a comfortable ODI lock-on grip is mounted,

which does not require any wire or glue to be fixed.      


Featuring lightweight, CNC machined hubs and high-end Excel rims, they guarantee maximum

stability and minimal unsprung weight. The wheels are shod with the latest

Dunlop Geomax MX 3S tires.


The WP monoshock has been developed with the entire frame and swingarm architecture

in mind, including the linkage system and the WP AER 48 front forks. It features machined

and black anodized components and is a valuable, high-end product compared to

roughcast reservoirs. A new setting and a softer spring perfectly match the reworked

front-end set-up and its sparkling WP color scheme lets everyone know you have

excellent taste in suspension.      


The lightweight WP AER 48 front fork, a 48mm USD air-sprung fork developed by WP in

close collaboration with KTM, is a split fork with separate functions for each leg. That means

damping functions are on the right side, whereas the air spring is in the left. This left leg

features a two-chamber system with a capsuled air cartridge to prevent loss of air pressure.

Should the outer seal start to leak, the internal cartridge pressure will keep the bike in position.

The air spring is easy to adjust to any rider weight via a single air valve. No special tools

are required; the air pump supplied with the bike will do just fine. The right fork leg integrates

a damping cartridge that tailors to all your damping needs. It can be adjusted to the track

conditions and the rider’s preferences with a twist of a dial (compression from the top,

rebound from the bottom, 30 clicks each). For MY2017, the AER 48 also features redesigned

outer tubes with better bending characteristics, smoother operation and less friction. Plus:

they’ve lost some weight (265g). Right off the dealer floor, these forks are more comfortable

and more sensitive than ever. But you can still hammer the hell out of them.    


Top quality, CNC machined triple clamps have been something of a KTM trademark for years.

Ensuring a precise handling, they perceptibly support the flex characteristics, and

with it the action of the forks. For MY2017, the upper triple clamp specifically features a

redesign in conjunction with the new fork tubes. The rubber damped handlebar fixation

has also been reworked and the lower handlebar clamps are now separated, while on

the upper side a new bridge-type clamp guarantees more torsional stiffness and can easily

be replaced in case it gets twisted due to a crash. In addition, an hour meter is fitted at

the upper triple clamp in order to let the rider know it’s time for a service. Or a cold drink.  


You couldn’t brake any harder, better, faster or stronger. These high-tech Brembo babies are combined

with lightweight wave discs made by Galfer. For MY2017, the rear brake features a 10mm

longer brake pedal and you get new, less aggressive brake pads all round.    


KTM R&D, Kiska Design and all our factory riders had their say in shaping the plastics. Their goal:

complete harmony between rider and bike. And so it turned out. Perfect ergonomics and contact points,

maximum freedom of movement, a low seat height and sweet comfort, especially in the rear part of the seat.

The I-beam structures of the front and rear fenders are prime examples of such an intelligent design,

guaranteeing maximum stability and a low weight thanks to well thought-out construction and mounting.

Plus: they stay cleaner for longer. 


A new, tailor-made kit, fit for a king. Because in this sport, champs deserve to look the

part regardless of the dirt.      








Design 1-cylinder 2-stroke engine
Displacement 143.6 cm³
Bore 56 mm
Stroke 58.4 mm
Starting aid Kickstarter
Transmission 6-speed
Primary drive 23:73
Secondary ratio 13:48
Clutch Wet multi-disc clutch, Brembo hydraulics
EMS Kokusan                                                                                            


Frame 25CrMo4 steel central-tube frame
Front suspension WP-USD, AER Ø 48 mm
Rear suspension WP shock absorber with linkage
Suspension travel Front 310 mm
Suspension travel Rear 300 mm
Brake system Disc brakes
Brake discs - diameter Front 260 mm
Brake discs - diameter Rear 220 mm
Chain 5/8 x 1/4"
Steering head angle 63.9°
Wheel base 1485±10 mm
Ground clearance 375 mm
Seat height (unloaded) 960 mm
Total fuel tank capacity approx. 7 l
Weight without fuel approx. 87.2kg


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