Produktinfo

DYNAMIC IN EVERY WAY

The KTM 250 SX-F was primed for global domination and is set to continue its dominance with more innovative changes. Not only is it the lightest bike in its class, but it also offers unrivalled, confidence-inspiring power delivery, making it a great choice for both amateur and professional riders. Laying the power down effectively is the secret to fast lap times and this capable package has all the right credentials to get the most important job done – getting to the chequered flag first.

Motor og eksos

Motor og Eksos

Renowned as the strongest engine in MX2 competition, the 2019 version pushes the boundaries of innovation even further. With updates on valve timing, exhaust, airbox and EMS, the entire power pack produces even more torque and power across the entire 14,000 rpm range. Its compact structure contributes to excellent mass centralization, which supports the easy ride-ability of the bike. The low weight of only 25.9 kg, in combination with the compact engine layout and unrivalled power, once again makes the new KTM 250 SX-F a real force to be reckoned with, yet still easy to ride for both amateur and professional riders.

TRANSMISSION

The KTM 250 SX-F is now fitted with a new, more robust 5-speed transmission. The gear ratios were carried over from the predecessor, but all the gears feature improvements and reinforcements. Another highlight of the transmission is the no dirt gear shifter. Similar to the foot peg design, it prevents the build-up of dirt and […]

HANDLEBAR MAP SELECT SWITCH

Within easy reach of the left grip on all four-stroke models, is a multi-functional handlebar map switch, which features the innovative control functions, traction control, launch control and alternative power curves (standard advanced). The TRACTION CONTROL is a unique feature which has a new setting for 2019. It guarantees more efficient traction and better control […]

EXHAUST

When it comes to improved power delivery and performance, the new exhaust on all 4-stroke models play a key role and packs a punch that is hard to beat. It features a new, model specific header pipe with a further advanced resonator called FDH (Flow Design Header), which is a small chamber around the pipe. […]

ENGINE MANAGEMENT SYSTEM

The state-of-the-art Keihin Engine Management System, with electronic fuel injection, features a new 44 mm throttle body. The injector position is unique and guarantees optimal atomization of the fuel and air on the way to the combustion chamber, resulting in instant response and maximum performance when opening the throttle. There are also separate systems for […]

ENGINE

Renowned as the strongest engine in MX2 competition, the 2019 version pushes the boundaries of innovation even further. With updates on valve timing, exhaust, airbox and EMS, the entire power pack produces even more torque and power across the entire 14,000 rpm range. Its compact structure contributes to excellent mass centralization, which supports the easy […]

E-STARTER

Time is crucial in the heat of the race and an electric starter gets you fired up and back in the battle as soon as possible. The electric starter is standard on the KTM 250 SX-F and features a strong starter motor made by Mitsuba. The proven starter drive guarantees efficient and reliable starting when […]

CYLINDER HEAD

An integral part of the class-leading power delivery is the cutting-edge DOHC (double overhead camshaft) cylinder head. It features two overhead camshafts which activate the titanium valves (intake 32.5 mm, exhaust 26.5 mm) via the super-light, DLC coated finger followers. For 2019, the exhaust camshaft features a new timing that has further refined power delivery.

CYLINDER AND PISTON

The 78 mm bore cylinder houses a lightweight, forged, bridged, box-type piston, made to the highest standards by CP. It has an extremely rigid structure and features a unique crown shape to suit the high-compression combustion chamber. The compression ratio is at 14.4:1 and thanks to the combination of low oscillating masses, the engine displays […]

CRANKSHAFT

The 250 SX-F’s has a rigid crankshaft which features a connecting rod with a plain big end bearing featuring two force-fitted bearing shells run directly on the crank pin. This design is a major prerequisite for the extremely high engine speed levels and the unrivalled maximum power of the 250cc engine. Not only that, it […]

CRANKCASES AND ENGINE COVERS

The compact engine cases are manufactured using a high pressure die-cast production process that helps with weight reduction, while retaining strength and durability. The design allows for optimal shaft arrangements close to the center of gravity, resulting in ideal mass centralization and easier ride-ability. Plus, the new engine covers feature a smart surface structure that […]

COOLING

Maintaining the optimal engine temperature is crucial to ensuring consistent horsepower throughout the ride. The KTM 250 SX-F features newly designed radiators which are mounted 12 mm lower than the predecessors. This lowers the center of gravity and matches the design of the new shrouds perfectly, in order to achieve perfect ergonomics. By using CFD […]

CLUTCH

The newly developed DS (diaphragm steel) clutch features a durable, one-piece clutch basket and primary gear, made of high-strength billet steel, guaranteeing unbeatable reliability. It is fitted with extremely heat-resistant steel carrier friction discs, which are pre-tensioned by means of a diaphragm spring. This system ensures the most effective disengagement, resulting in immediate power to […]

BALANCER SHAFT

In order to balance the mass-forces the 250 SX-F produces, the engine is fitted with a multifunctional counter balance shaft. It effectively reduces vibration and drives the water pump and timing chain.

Chassi

Chassi

Every rider knows that when the feeling on the bike is good, the ride is awesome. The chassis forms an integral part of this “feeling” and has been designed to provide accurate feedback between track and rider, while also reducing the harshness of typical motocross terrain. The KTM 250 SX-F features a new lightweight, high-tech steel frame that not only provides a great feeling, but has been optimized for more accurate rider feedback. The new flex characteristics provide excellent agility and high-speed stability, contributing to an intuitive ride like no other.

WHEELS

KTM uses lightweight, CNC-machined hubs and high-end Excel rims on all SX models, guaranteeing maximum stability and minimum weight. For 2019, the aluminum spoke nipples feature a reworked design, which conveniently reduces the frequency with which the spokes need to be tightened. The wheels are fitted with the latest Dunlop Geomax MX 3S tires, delivering […]

TRIPLE CLAMP

All SX models feature top quality, CNC-machined triple clamps and have become somewhat of a KTM trademark. For 2019, the triple clamp has been reworked with stiffer upper clamps (22 mm offset for all models) to suit the reworked frame stiffness and flex characteristics of the latest WP AER forks. The result is a front […]

SWINGARM

The KTM 250 SX-F’s new one-piece swingarm, is manufactured with a gravity die-cast production process, for exceptional strength at the lowest possible weight. It also has a 5 mm longer axle slot, allowing the wheel to be adjusted further back, for even greater stability on choppy tracks. The swingarm’s chain measurement markings are visible from […]

REAR SUSPENSION

All SX models feature a DDC monoshock, which has been developed to work as a complete unit with the entire frame and swingarm architecture, as well as the linkage system and the AER 48 forks. It features high-quality machined and anodized components, which add a touch of class and give it appeal beyond just a […]

FUEL TANK

All models in the SX range are fitted with newly designed lightweight polyethylene fuel tanks. The fuel capacity on the full-size SX models is still 7 liters, but the new shape improves the ergonomics. The filler cap has an inside thread that makes for easy and reliable closure. For the 4-stroke models the fuel pump […]

FRONT SUSPENSION

All full-size SX models are fitted with the super-lightweight WP AER 48 front fork. It is a 48 mm USD air-sprung fork with separate functions for each fork leg, meaning damping functions are on the right side and the air spring is on the left. The left leg features a two-chamber system with a capsuled […]

FRAME

The new frame on the KTM 250 SX-F has to cater for the dynamic riding styles associated with MX2 racing. For this reason, along with the rest of the SX range, it is professionally crafted from hydro formed Chromium Molybdenum steel tubes that are robot welded, ensuring the highest levels of consistent quality. Improved stiffness […]

BRAKES

High-tech Brembo brakes have always been standard equipment on all KTM motocross bikes. Combined with lightweight wave discs, the renowned system provides the highest level of braking efficiency, enabling you to out-brake the competition.

AIRBOX

The new airbox on the KTM 250 SX-F has been completely reworked to ensure better flow dynamics, and together with new intake snorkels, leads to optimal power and throttle response. Despite the obvious performance enhancements, the new design also offers maximum protection against soiling of the air filter. The large Twin-Air air filter is mounted […]

Ergonomi og komfort

Ergonomi og komfort

It is important for a rider to work in harmony with the motorcycle, maintaining momentum by moving together with the natural forces. KTM has focused extensively on ergonomics that are optimal for high-level performance, ensuring a neutral riding position that offers the best maneuverability and control. The handlebar position can also be adjusted to suit every rider size and ergonomic preference. A rider’s main interaction with the motorcycle comes through the bodywork, seat, footpegs and handlebars, which all play a vital role in overall control. When it comes to ergonomics, absolutely no compromises were made and only the best quality products feature on the 2019 SX models.

SEAT

All SX models have a newly shaped seat, designed to match the improved ergonomics. The seat cover features newly developed silicone strips that provide better feel and grip for the rider. The seat is conveniently fixed to the bike using one long, lateral screw, making it safe and easy to handle.

HANDLEBAR

All full-size SX models are equipped with the same high-strength aluminum tapered handlebar, made by NEKEN. The handlebar is fixed in rubber damped mountings, which allow for two different positions. The handlebars come standard with an ODI vulcanized grip on the right side and a comfortable ODI lock-on grip, which does not require any wire […]

FOOTPEGS

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 MY2018 EXC models, which are 6mm higher than the SX versions.

Bodywork og dekaler

Bodywork og dekaler

KTM’s 4-stroke motocross bikes are the industry benchmark when it comes to innovative technology and styling. With input from KTM’s factory riders, as well as KTM R&D and Kiska Design, the new bodywork of the KTM 250 SX-F pushes the boundaries of progression even further. The result is a shape that achieves complete harmony between rider and bike and features across the entire SX range. The main goal was to provide the optimal contact points that allow a rider maximum freedom of movement and improved handling. The front and rear fenders feature an intelligent I-beam design, guaranteeing maximum stability with the lowest possible weight. The new graphics add to the fast and aggressive style of the bike and also confirms KTM’s never-ending quest for race-winning progression.

DECALS

A new, tailor-made kit and a Factory orange frame. Because in this sport, champs deserve to look the part regardless of the dirt.

Programvare og elektronikk

Programvare og elektronikk

4-strokes have defined the modern era of motocross and KTM have used the SX-F range to push the boundaries of innovation. To stay ahead in the competitive MX2 class, KTM equipped the 250 SX-F with a multifunctional handlebar map switch. The unit activates innovative features like traction control, launch control and even alternative power curves. KTM’s engineers have pushed performance to the extreme, making electronics a necessary progression that ensures power is delivered in the most effective way. KTM SX-F models also feature other unique advantages, like the proven electric starter. Now, more than ever, READY TO RACE performance is just the push of a button away.

BATTERY & WIRING HARNESS

All SX-F models feature a new, more capable, super lightweight 2 Ah Lithium-Ion starter battery, ensuring even safer starting of the engine, especially in cold weather conditions. The packaging of the voltage regulator and condenser has been reworked to concentrate all the electrical components in a common area below the seat, making the entire system […]

Tekniske detaljer

TECH DETAILS

Engine
Design
1-cylinder, 4-stroke engine
Displacement
249.9 cm³
Bore
78 mm
Stroke
52.3 mm
Starter
Electric starter
Transmission
5-speed
Clutch
Wet multi-disc clutch, hydraulically actuated
EMS
Keihin EMS
Chassis
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
Chain
5/8 x 1/4″
Steering head angle
63.9 °
Ground clearance
370 mm
Seat height
950 mm
Tank capacity (approx.)
7 l
Weight READY TO RACE (without fuel)
99 kg
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