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Since Tony Cairoli first took a KTM 350 SX-F to the top of the MX1 World Championship in 2010, the Red Bull KTM athlete has dominated the class aboard this nimble but powerful bike with 5 (five!) consecutive world championship titles. No surprises here, with the combination of 450-style muscle and the agility of a 250. Who said you can’t have everything?



The engine of the KTM 350 SX-F features a compact and very

light (27.2kg) construction. Its DOHC (double overheard camshaft)

design with lightweight titanium valves and DLC coated

cam followers allows for lively but strong engine characteristics.

Fitted with the latest electronic fuel injection system

and an E-starter, it has an extremely wide usable speed range,

high performance and incredibly efficient rideability. The

KTM 350 SX-F engine shares the same layout as

the one in the KTM 250 SX-F, its playful handling similar

to a 250 machine resulting mainly from reducing the

moving masses to a minimum.






The cylinder head features two overhead camshafts with

friction-optimized cam followers boasting a DLC coating

and high-flow ports. Four lightweight titanium valves

maximize the flow rate for an optimal power band and outstanding

performance across the seemingly endless rev range

of 13,400rpm, power peaking at 58hp. Lateral brackets

made of aluminum allow an efficient fixation of the engine

to the frame and contribute to the bike’s featherweight feel.





The KTM 350 SX-F’s crankshaft utilizes a short connecting rod,

which makes for an overall compact and lightweight engine

with a snappy power delivery. A plain big (bottom) end bearing

with two force-fitted bearing shells runs directly on the crank pin.

The necessary oil feed for this bearing is ensured by the

engine’s pressurized lubrication. This design is a decisive

benefit in terms of the crankshaft service interval, which

can be lengthened due to the plain bearing. So just pin it,

all day long.



To balance the mass-forces, the KTM 350 SX-F engine uses a

multifunctional  balancer shaft, which at the same time drives

the water pump and timing chain. Win, win, win!




Inside the short cylinder, with a bore of 88mm, thumps a box-type

piston made by CP. Its crown geometry is adapted

perfectly to the high-compression combustion chamber

(14:1), where its rigid structure and low weight shine. Thanks

to the low oscillating masses, the engine is both snappy

and strong.





The KTM 350 SX-F is fitted with a unique E-starter as standard,

which is a clear advantage when it comes to crunch time

in the heat of battle. A strong starter motor made by

Mitsuba will fire time and time again at the push of a button.

Even under extreme conditions, thanks to its more heat resistant




The engine is fitted with a smooth 5-speed transmission,

which features a special surface treatment on the 2nd,

3rd and 4th gears for best reliability. An advanced ´No Dirt´

gear shift lever design prevents mud and sand from

blocking the joint of the lever and guarantees trouble-free shifting.

All 4-stroke engines are fitted with a gear position sensor,

giving the option of different engine characteristics for each gear.

In MY18, the transmission shaft gets a new C4 bearing

that has a bigger overlap in the case. This guarantees better

reliability even at extremely high operating

conditions. Think GP-level riding. In knee-deep sand.




The design of the die-cast crankcases allows for minimal

weight and a very centralized shaft configuration. This

makes the engine short and compact, while contributing

to an efficient centralization of masses. The engine covers

also feature a solid surface structure, which reduces

the wear caused by the rider’s boots. This way,

your SX-F will keep looking better longer.




The KTM 350 SX-F employs the KTM-developed CSS

clutch (coil spring steel) with a robust steel basket and

extremely heat resistant clutch plates and new, nitrated steel

liners reducing the wear. Light operation and telepathic amounts

of control are standard with this hydraulic Brembo

actuated clutch.



KTM engineers just love dropping weight year after year.

The result: the 2018 KTM SX models are the slimmest,

lightest dirt bikes out there. Even though the 4-strokes are

equipped with an E-starter as a standard feature, while

the competition still needs to be kickstarted. You can

just focus on kicking ass.




FIM noise limits are a real challenge for every manufacturer.

Therefore, KTM has put a lot of effort into the development

of their exhaust systems. All 4-strokes are fitted with headers

that have a unique standard feature; an additional resonator

system – a small chamber connected to the pipe. All 4-strokes

are fitted with a short silencer, mounted as close to the

engine as possible. You know what that means: extra mass

centralization and better rideability. Its advanced internal design

reduces the noise sufficiently in order to sit safely

below the noise limit, while still raising the hairs on your neck.




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

aluminum engine head stays (the connection between cylinder

head and frame) contribute to more 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.




Sophisticated ´No Dirt´ footpegs prevent clogging of the

footpeg pivot, even when digging in deep ruts. Looking

for a higher riding position? Then just mount the footpegs

of the MY2018 EXC models, which are 6mm higher

than the SX versions.




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 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.



KTM engineers sure know how to handle handlebars.

This tapered one, made of high-strength aluminum,

is fixed in damped rubber mounts and has two

different positions. ODI lock-on grips make grip

changes easy and do not require any wire or

glue to be secured.



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.





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.  






Featuring lightweight, CNC machined hubs and high-end Exce

l rims, they guarantee maximum stability and minimal

unsprung weight. The wheels are shod with the

latest Dunlop Geomax MX 3S tires.




Shock absorber

The WP shock absorber has been developed with the entire

frame and swingarm architecture in mind, including the

linkage  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, confidence inspiring

setting with improved damping characteristics perfectly

matches the front-end setup 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 2-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

fork 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). Right off the

dealer floor, this fork (with reworked damping characteristics) is more

comfortable and more sensitive than ever. But you can

still hammer the hell out of it.




Top quality, CNC machined triple clamps have been a KTM

trademark for years to ensure precise handling.

The rubber damped handlebar fixation allows for

two positions and an hourmeter is fitted in order

to let the rider know it’s time for a service.





These high-tech Brembo babies are combined with lightweight

Wave brake discs. You couldn’t brake any harder,

better, faster or stronger.



All 4-stroke models are equipped with a sophisticated new

multi-functional handlebar map select switch, which does

three things: Activation of the traction control Activation of

the launch control Selection of an alternative power curve

(Standard or Advanced) The traction control is a unique feature

that none of the competitors can offer. It guarantees more

efficient traction when the track conditions are less than

perfect. Push the tip switch and reign supreme. With this map

select switch the rider can also activate the launch control,

which provides more efficient starts out of the gate so you can go

for the holeshot, time and time again. How? It simply reduces

the maximum engine speed for the very first moment of the

start, in order to give you better control. Push both tip switches

when the engine idles and the EFI control lamp mounted on the upper

triple clamps will let you know you are READY TO RACE. In addition, the map

select switch gives the rider the chance to select an alternative,

more powerful map beside the standard configuration.

Welcome to the future.



A strong new lithium ion battery breathes life into the engine and

contributes to low vehicle weight. The lightweight battery and

wiring harness are centralized in a compartment above the

air filter box, allowing the mechanic to remove the subframe

without getting in conflict with the electronics. A happy

mechanic is a good mechanic.



Like all KTM 4-stroke motorcycles, the 350 SX-F is started at

the push of a button - a priceless advantage when you’re on the clock.




KTM R&D, KISKA Design and all our factory riders had their

say in shaping the plastics with one goal: complete harmony

between rider and bike. Perfect ergonomics and contact points

provide maximum comfort in movement on the SX-F. The

I-beam structures of the front and rear fenders guarantee

maximum stability and a low weight thanks to well thought-out

construction and mounting. They also stay cleaner for longer.




A new, tailor-made kit and a Factory orange frame.

Because in this sport, champs deserve to

look the part regardless of the dirt.












Design 1-cylinder, 4-stroke engine
Displacement 349.7 cm³
Bore 88 mm
Stroke 57.5 mm
Starting Electric starter
Transmission 5-speed
Primary drive 24:73

Secondary gear ratio

Clutch Wet, CSS multi-disc clutch, Brembo hydraulics
EMS Keihin EMS




Frame design

25CrMo4 steel central-tube frame

Front suspension

WP-USD, AER 48, Ø 48 mm

Rear suspension

WP shock absorber 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


5/8 x 1/4"


Steering head angle

63.9 °


1485 ± 10 mm

Ground clearance

370 mm

Seat height

960 mm

Tank capacity (approx.)

 7 l

Weight READY TO RACE (without fuel)

99.8 kg


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