KTM has pulled the sheets off the 2019 dual-sport line today. The 250, 350 and 500 EXC models have a number of motor changes, and share many chassis updates with the XC-W two-stroke off-road line.

4-STROKES EXC-F DUAL SPORT MODEL RANGE
Offering highly competitive extreme off-road bikes while meeting the requirements to be 50 state street legal. The comprehensive line-up of KTM 4-stroke EXC-F ranges from the nimble 250 EXC-F and 350 EXC-F to the extraordinary 500 EXC-F powerhouse.
State-of-the-art engines featuring the latest electronic fuel injection provide not only the customary, high power levels expected from a genuine KTM Dual Sport. With a compact architecture optimized down to minute details, the power houses also contribute significantly to the latest round of weight savings and centralized masses, supporting the state-of-the-art chassis in delivering previously inconceivable levels of ride ability. EXC-F Intake Sophisticated Velocity Focused Intake reed Valve Set in the Intake Boot increases torque and throttle response and reduces noise.
Comprising three models which are very different and yet united by KTM’s pursuit of quality, the EXC-F range of off-road models are street legal.

250 EXC-F
The smallest model of the KTM 4-stroke range is a great choice for motivated amateurs and ambitious pros alike, with its super compact, powerful engine, minimal weight and well-centered masses providing a lively performance and fantastic handling. Sharing many components with the successful 350 EXC-F engine, this power plant offers class-leading performance with plenty of torque thanks to its advanced fuel injection system. The 250 is easy to ride, agile and highly controllable for complete rider confidence, with state of the art technology for great throttle response and controlled power delivery.
ENGINE
The 250 EXC-F DOHC engine has a very compact and lightweight design and delivers class-leading torque and power figures across the entire power band all the way up to 12,800rpm. Its compact architecture contributes to an excellent mass centralization, supporting the ride ability of the bike. In addition, it only weighs 60.8 lb. That is including the incredibly beneficial electric starter.

CYLINDER HEAD
The centerpiece of the compact DOHC (double overhead camshaft) engine is the cutting-edge cylinder head. It features two overhead camshafts, which activate the titanium valves via super-light finger followers with a hard DLC coating.

TRANSMISSION
The 250 4-stroke transmits its unrelenting power through a 6-speed transmission with gear ratios specifically optimized for its power delivery. An advanced KTM ‘No Dirt’ gear lever design prevents dirt from blocking the joint of the lever, contributing to secure gear engagement. All KTM 4-stroke EXC-F’s feature a gear sensor to sync up the engine’s power curve to the currently selected gear as well as the surface conditions.
CLUTCH
Actuated by BREMBO hydraulics, the clutch is distinguished by consistently precise control across the entire operating temperature range. The KTM-developed DDS clutch employs a diaphragm spring instead of the usual coil springs for a significantly easier clutch action, while providing sufficient space for a damping system to be integrated into the clutch hub. The added benefit is increased traction and outstanding clutch durability.

ELECTRIC STARTER
The standard E-starter provides the 250 EXC-F with a clear advantage in dicey race situations. Engaged by the proven KTM starter drive and powered by an even stronger, high capacity and lightweight lithium ion battery, a reliable Mitsuba starter motor makes sure the 250 is fired up reliably and easily in any conditions at the push of a button.

ENGINE MANAGEMENT SYSTEM
The state-of-the-art Keihin Engine Management System with electronic fuel injection features a 42mm throttle body. Its unique injector position ensures a very responsive power delivery. Separate systems automatically take care of cold starts and idle adjustment.

350 EXC-F

When optimum ride ability and maximum offroad performance are called for, there is no substitute for the KTM 350 EXC-F. Combining the handling of a 250 with power closely approaching 450 levels, its compact, powerful DOHC engine, low weight and perfectly tuned suspension make sure this machine masters each and every challenge with ease. And thanks to its playful agility, the 350 EXC-F retains the advantage when the going gets really tough. The longer the distance, the more riders on all levels benefit from its low-fatigue design for maximum riding fun.

ENGINE
The 350 cm³ 4-stroke engine with a state-of-the-art electronic fuel injection system offers a very wide power band and is distinguished by a dynamic but low-fatigue power delivery. At the core: a highly sophisticated DOHC cylinder head with DLC-coated finger followers and flow-optimized ports, as well as a highly rigid, box-type, 88 mm piston. At the same time, the engine’s compact architecture helps to group the masses tightly around the bike’s center of gravity for outstanding ride ability. All of this makes the 350 EXC-F brilliantly suited to both amateur riders as well as consummate pros.
CYLINDER HEAD
The centerpiece of the compact DOHC (double overhead camshaft) engine is the cutting-edge cylinder head. It features two overhead camshafts, which activate the titanium valves via super-light finger followers with a hard DLC coating.

TRANSMISSION
A rugged 6-speed transmission, wide gear ratios and a special low-friction coating on the shift forks serves to transmit the power of the 350 EXC-F to the rear wheel. The gear lever is protected by its advanced KTM ‘No Dirt’ design, preventing debris from blocking its joint for a secure gear engagement at all times. A gear sensor syncs up the engine’s power curve to the currently selected gear as well as the surface conditions.
CLUTCH
Actuated by BREMBO hydraulics, the clutch is distinguished by consistently precise control across the entire operating temperature range. The KTM-developed DDS clutch employs a diaphragm spring instead of the usual coil springs for a significantly easier clutch action, while providing sufficient space for a damping system to be integrated into the clutch hub. The added benefit is increased traction and outstanding clutch durability.
ELECTRIC STARTER
Fitted as standard with a rugged electric starter, the 350 EXC-F will fire up with the greatest reliability, a great benefit especially in demanding offroad races. The powerful Mitsuba starter motor is powered by a new, even stronger lightweight lithium ion battery. Riders insisting on a mechanical back-up may retrofit the KTM PowerParts kick-starter kit.
ENGINE MANAGEMENT SYSTEM
The state-of-the-art Keihin Engine Management System with electronic fuel injection features a 42mm throttle body. Its unique injector position ensures a very responsive power delivery. Separate systems automatically take care of cold starts and idle adjustment.

 

500 EXC-F

The most powerful off-road competition bike on the market, the KTM 500 EXC-F combines raw 4-stroke punch with outstanding ride ability, thanks to its high tech, large-displacement engine sitting in a chassis optimized for low weight and outstanding agility. With an incredible power-to-weight ratio, this awesome 510 cm³ SOHC single provides nothing less than the most dynamic enduro experience available, not the least due to its sophisticated mass centralization and geometry, made possible in part by a highly compact engine layout. The extended levels of ride ability afforded by the expert-grade chassis are a necessity in order to successfully tame this kind of performance, for a true racing advantage.

ENGINE
The 500 EXC-F’s fuel-injected powerhouse is the most compact and lightest 500 on the market, while delivering awesome torque and power across the power band. The four valves of the SOHC cylinder head are controlled by extremely rigid rocker arms while flow optimized ports ensure an efficient gas exchange. Vibrations are kept in check by a carefully optimized crank drive with plain bearings, as well as a multifunctional balancer shaft. The cutting edge Keihin engine management system with electronic fuel injection and a 42 mm throttle body ensure an astonishing response.

CYLINDER HEAD
Inside the SOHC cylinder head, an overhead camshaft controls four ultra-lightweight titanium valves via extremely rigid rocker arms, which are DLC-coated on the intake side. A configuration like this allows high engine speeds and powerful engine characteristics.

TRANSMISSION
The 6-speed transmission of the 500 EXC-F is fitted with all the latest trimmings, from the gear sensor supporting the engine management, to friction optimized shift forks and gear wheels, to the ingenious KTM ‘No Dirt’ gear lever, unfazed by any kind of debris for a secure gear engagement.

CLUTCH
Actuated by BREMBO hydraulics, the clutch is distinguished by consistently precise control across the entire operating temperature range. The KTM-developed DDS clutch employs a diaphragm spring instead of the usual coil springs for a significantly easier clutch action, while providing sufficient space for a damping system to be integrated into the clutch hub. The added benefit is increased traction and outstanding clutch durability.
ELECTRIC STARTER
The standard E-starter provides the 500 EXC-F with a clear advantage in dicey race situations. Engaged by the proven KTM starter drive and powered by an even stronger, high-capacity and lightweight lithium ion battery, a reliable starter motor makes sure the engine is fired up reliably and easily in any conditions at the push of a button.

ENGINE MANAGEMENT SYSTEM
The state-of-the-art Keihin Engine Management System with electronic fuel injection features a 42mm throttle body. Its unique injector position ensures a very responsive power delivery. Separate systems automatically take care of cold starts and idle adjustment.

The tech details for the EXC chassis are essentially the same as those for the XC-W two-stroke line. Click here for info on the 2019 KTM off-road two-strokes.