Produktinfo

Power Supremacy

The championship winning KTM 450 SX-F is a proven formula that is the industry benchmark. For 2019, this new machine takes the next step in efficient performance and easy handling. It is fitted with a newly designed, extremely compact, single overhead camshaft cylinder head, as well as the latest electronic fuel injection. Pushing out an unrivalled 63hp in the most effective way possible, this 450 cc is the fastest Motocross bike KTM has ever built.

Motor og eksos

Motor og Eksos

The 450cc engine is the ultimate powerhouse when it comes to KTM’s competitive motocross range. Significantly reworked for 2019, it features even more compact dimensions and reduced weight. It is fitted with a newly designed, extremely compact single overhead camshaft cylinder head and the latest electronic fuel injection. This enables the impressive 63hp to be distributed extremely efficiently throughout the rev range. Even with its super-beneficial electric starter this model is still the lightest 450 engine on the MX market.

TRANSMISSION

The 2019 KTM 450 SX-F uses a reworked transmission that further improves durability. There was no need to change the gear ratios as they have been perfectly matched to the power delivery of the large displacement engine. All four-stroke engines are fitted with a gear sensor, which provides the option of different engine characteristics for […]

HANDLEBAR MAP SELECT SWITCH

Within easy reach of the left grip on all four-stroke models, is a multifunctional 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 […]

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 […]

E-STARTER

The standard electric starter on the KTM 450 SX-F uses a proven starter drive and a strong starter motor made by Mitsuba. As demonstrated time and time again, it provides quick and reliable starting, saving you precious time and energy when you need it most.

Cylinder head

The 450 SX-F is fitted with a newly developed SOHC (single overhead camshaft) cylinder head which is much more compact, 15 mm lower and 500 gr lighter. The changes have further improved mass centralization, elevating handling to new levels of excellence. The new overhead camshaft is also closer to the center of gravity and features […]

CYLINDER AND PISTON

The 95 mm bore cylinder houses a lightweight, box-in-box type piston, made to the very highest standards. Its design contributes to the engine’s low vibrations and overall engine speed strength. The compression ratio is at 12.75:1 and due to the low oscillating masses, the engine is not only powerful, but also displays extremely lively characteristics.

CRANKSHAFT

The KTM 450 SX-F’s crankshaft is located in an ideal position close to the center of gravity, contributing to better mass centralization. It utilizes a short connecting rod, which allows for a compact motor design and a snappier power delivery. The whole unit is extremely well-balanced, with the perfect amount of inertia for optimal traction […]

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 better 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 450 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 KTM 450 SX-F is fitted with the extremely durable, KTM-developed DDS clutch (damped diaphragm steel), with a wear-free steel basket and heat resistant clutch plates. It uses a diaphragm spring instead of the usual coil springs, which results in considerably easier clutch action. The diaphragm spring is also compact enough to allow for a […]

BALANCER SHAFT

The multifunctional side mounted counter balance shaft masterfully balances all the oscillating forces, while also driving the water pump. It effectively keeps engine vibrations to a minimum, resulting in the smoothest ride even at the highest engine speeds.

Chassi

Motor og Eksos

The KTM 450 SX delivers metal twisting torque and requires a strong frame to cope with its immense power. For 2019, a new lightweight, high-tech steel frame was developed to further improve the power-weight-ratio, without compromising strength and durability. It features refined flex characteristics that ensure the bike soaks up those big hits while also maintaining excellent agility and high-speed stability. The chassis also features additional innovative elements, like “no dirt” foot pegs and new brackets for mounting an optional composite skid plate. Overall, every element of the chassis contributes to an intuitive, high-performance 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 450 SX-F features a new one-piece swingarm, manufactured using a gravity diecast production process. With the exceptional strength required to withstand the tough conditions of motocross and the brutal torque of a 450cc, it has a 5 mm longer axle slot, giving riders more options when aiming for the ideal wheelbase setup for […]

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

A lightweight polyethylene tank with a capacity of 7.0 liters. The fuel tank cap has an inside thread, which makes for easy and reliable closure.

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 frame on the KTM 450 SX-F is newly designed to better endure the extreme forces this powerhouse will put it through. For this reason, along with the rest of the 2019 SX range, its professionally crafted hydro formed Chromium Molybdenum steel tubes are robot welded, for the highest levels of consistent quality and strength. […]

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 450 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

Motor og Eksos

When it comes to the powerhouse of KTM’s SX range, it is imperative that a rider is able to shift his weight quickly and easily to work in unison with the motorcycle. KTM places a great deal of emphasis on creating the optimal ergonomics for high-level performance, making sure the neutral riding position offers the best control. A rider’s main interaction with the motorcycle comes through the bodywork, seat, footpegs and handlebars and these crucial contact points play a vital role in balance and control. There is no doubt that the KTM 450 SX-F packs a serious punch and by ensuring the very best high-performance ergonomics, a rider has the confidence and control to use it as it is meant to be.

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 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.

Bodywork og dekaler

Motor og Eksos

Unloading a KTM 450 SX at the track is an immediate declaration of your race winning intentions. With the help of KTM factory riders, as well as KTM R&D and Kiska Design, they were able to further refine the bodywork of the entire SX range, achieving complete harmony between rider and bike, further enhancing this powerhouse’s dominant appeal. Their main focus when designing the SX range was to provide contact points that allow maximum freedom of movement and improved overall handling. Brute strength at the lowest possible weight is what this bike is all about and can be seen in the intelligent I-beam design on the front and rear fenders, which guarantee maximum stability at no extra weight. The new aggressive-looking graphics were not only a necessary change, but were designed to send a clear message to the competition that this is not a bike that should be taken lightly.

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

Motor og Eksos

With the KTM 450 SX-F producing a dirt ripping 63hp, every effort has been made to ensure the power is delivered in a controlled manner. Additional to the considerable mechanical effort to ensure usable delivery of the power is an electronics package with the ability to refine it to perfection. Activated by a multifunctional handlebar map switch, a rider has access to important features like traction control, launch control and even alternative power curves. Many hours were spent in development, creating mind-blowing power and torque. This made electronics a necessary innovation that ensures power gets to the ground in the most effective way. A proven electric starter gets this dirt-shredder fired up, ensuring the ultimate motocross experience starts with the simple push of a button.

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
449.9 cm³
Bore
95 mm
Stroke
63.4 mm
Starter
Electric starter
Transmission
4-speed
Clutch
Wet, DDS multi-disc clutch, Brembo hydraulics
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)
100 kg
Engine
Design
1-cylinder, 4-stroke engine
Displacement
449.9 cm³
Bore
95 mm
Stroke
63.4 mm
Starter
Electric starter
Transmission
4-speed
Clutch
Wet, DDS multi-disc clutch, Brembo hydraulics
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)
100 kg
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