Motorcycle specifications KTM250 EXC Six Days TPI 2019 In no time at all

A 2-stroke icon to satisfy the violence of a formidable event. When it comes to off-road motorsports, KTM and the ISDE (International Six Day Enduro) are undoubtedly among the biggest names in the industry. The KTM 250 EXC TPI SIX DAYS is in a class of its own. Designed to overcome the most grueling conditions and equipped with top-of-the-line components and revolutionary 2-stroke electronic fuel injection, the 2019 KTM 250 EXC TPI is a force to be reckoned with. As the 2018 ISDE event took place in Viña del Mar, Chile, the entire SIX DAYS range sports touches of red, white and blue in homage to the country's colors.

six Days equipment

- Six Days saddle for optimum comfort over long distances
- Exclusive Six Days graphics in a striking design
- Power curve change knob-on the handlebars
- Handlebars with Six Days logo
- Six Days muffler (anthracite anodized, with Six Days logo)
- Orange-anodized machined fork crowns for perfect fit and function
- Thermal protection on all 2-stroke models for effective muffler protection
- Floating front brake disc for even braking in extreme conditions
- Solid rear brake disc (non-perforated) for improved thermal resistance and reduced brake pad wear
- Supersprox Stealth bi-metal rear crown with aluminum inner crown and toothed steel outer crown for unrivalled durability
- Axle puller for rapid front-wheel removal
- Orange frame
- Engine guard
- Orange chain guide

engine and silencer

to meet the expectations of hard-core enduro riders, KTM has developed state-of-the-art 2-stroke engines. Featuring cutting-edge technology and torque and power tailored to the specificities of enduro riding, these 2-stroke engines are the weapon of choice for extreme off-road challenges.

cylinder

the KTM 250 EXC TPI's 66.4 mm-bore cylinder features a sophisticated control shaft for smooth power delivery. The injectors responsible for introducing fuel into the rear transfers are positioned on either side of the cylinder. Combustion is therefore more efficient, resulting in fuel savings and lower emissions. A small tube at the rear of the cylinder is connected to the intake pressure sensor, which communicates air flow to the control unit.

gearbox

the 6-speed gearbox, stepped specially for the Enduro, is a model of precision and smoothness. As safety is also an essential parameter, the selector adopts a new "zero dirt" design that prevents the lever joint from jamming due to dirt. Because even greasy terrain enthusiasts take a dim view of mud when it gets lodged in the wrong places.

engine housings and covers

for optimum mass centralization, KTM engineers have designed ultra-light, molded crankcases and raised the position of the vane.and raised the position of the crankshaft and clutch shaft to bring them closer to the center of gravity, resulting in exceptional handling. This trick also frees up space for a balance shaft, so you can swallow up the miles at full speed and in complete relaxation. Another interesting innovation to keep the engine as radiant as in the early days: crankcase covers with an elaborate surface structure designed to reduce wear caused by the rider's boots.

engine management

the engine management system (EMS) on TPI models features a control unit located under the seat. Ignition timing is calculated by the control unit. The precise amount of fuel to be injected depends on sensor readings such as ambient and intake air pressure, throttle position and oil and water temperature. As the system is designed to compensate for altitude and temperature fluctuations, injection requires no manual intervention by the pilot.

balancer shaft

numb hands and feet are not inevitable. The engine's design has made it possible to use a side-mounted balancer shaft that helps minimize vibrations. Driving is more comfortable and less tiring.

clutch

the KTM 250 EXC TPI uses a DDS (Damped Diaphragm Steel) clutch developed by KTM. a wear-free steel clutch housing, heat-resistant clutch plates and nitrate-treated steel liners. This clever design is distinguished by the use of a diaphragm spring instead of the usual coil springs, giving the clutch greater flexibility. The diaphragm spring also leaves plenty of room for a damping system integrated into the clutch hub, to enhance traction and durability. The clutch is activated by a hydraulic system manufactured by Brembo, which plays an essential role in the clutch's progressiveness and flexibility.

oil pump

the lucky owners of a KTM EXC TPI will now be able to do without the traditional 2-stroke oil-fuel pre-mix. An electronic oil pump circulates oil from the oil tank to the engine, via the throttle body, to ensure a perfect oil-fuel mixture, whatever the conditions and engine speed. The device, designed to reduce exhaust emissions by up to 50% compared with previous models, is controlled by the control unit according to engine speed and load, as measured by the throttle valve position sensor. With an oil capacity of 0.7 liters (enough for 5 to 6 full tanks of fuel), you'll have peace of mind for a long time to come.

injection unit

the TPI engine features a 39 mm throttle body developed by Dell`Orto. The amount of air entering the engine is regulated by a throttle linked to a cam (with two cables) controlled by the handlebar throttle. In addition, a throttle valve position sensor communicates air flow to the control unit, while idle speed is managed by the bypass screw. The cold-start device opens a bypass circuit to supply the extra air needed for cold starts. Oil drawn by the oil pump passes through the intake pipe before being mixed with incoming air to lubricate the crankshaft bearings, cylinder/piston, etc.

cooling

kTM's proven integrated cooling system circulates coolant from the cylinder head via the frame wishbone to the aluminum radiators supplied by WP. The additional KTM PowerParts cooling fan that can be added to this fuel-injected 2-stroke is now managed by the control unit, eliminating the need for a thermocontact. Its incredible efficiency is due to improved management of internal airflow and advances in ventilation thanks to CFD (Computational Fluid Dynamics) calculations. Radiator guards offer the advantage of better heat dissipation. This is all the more true in the presence of mud. Integrated into the front spoilers, these radiator guards are particularly useful in the event of an impact.

chassis

the high torsional rigidity of the chromium-molybdenum steel frame and lightweight rear frame ensures impeccable handling. TPI models feature an oil reservoir in the frame. The new fuel filler cap, housed between the fuel tank and the steering column, feeds the oil tank via a hose in the upper part of the frame tube.

frame

the high-tech chromium-molybdenum steel frame is a model of lightness, flexibility and handling.the high-tech chromium-molybdenum steel frame is a model of lightness, flexibility and maneuverability, offering excellent stability and devilishly precise cornering. Thanks to its high torsional stiffness and low longitudinal rigidity, this frame better absorbs the energy generated by the front and rear suspensions when jumping or negotiating a bump. The ride is more comfortable and less tiring. The dropouts that link the cylinder head to the frame are as light as ever. Mounted laterally, they help limit vibration levels. Two threaded inserts have been provided in the lower cradle tubes to add a shoe, should the need arise. The engineers can be proud of their work, as the frame is now one kilo lighter than the lightest competing frame on the market today. Every effort has also been made to facilitate maintenance and free up space for the fuel tank and other components. On EXC TPI models, the fuel filler cap at the top of the frame feeds the oil tank via a hose inside the frame tube. The ultra-light buckle, made of stable aluminum profiles, weighs in at less than 900 grams.

swingarm

in addition to weight savings, cast aluminum is ideal for bending. The one-piece molding process eliminates the imperfections inherent in welding, guaranteeing a more homogeneous, but also more meticulous, manufacturing quality.

wheels

when it comes to wheels, KTM engineers know their stuff. Featuring ultra-light CNC-machined hubs and top-of-the-range Giant rims, the EXC's wheels guarantee maximum stability despite limited weight. And because they're shod with MAXXIS tires, the bike is just as comfortable and safe off-road as it is on.

front suspension

the WP XPlor 48 upside-down fork is a fork with separate damping circuits, developed by WP in close collaboration with KTM. Each fork arm has its own spring, and each has a different function: the left arm handles compression damping, while the right arm handles rebound. To fine-tune each of these settings, simply turn the knob at the top of the fork. To limit the risk of bottoming, the fork is equipped with a watertight hydraulic stop. High-quality materials, an ultra-sophisticated production process, 300 mm of travel: nothing has been left to chance to make the WP XPlor 48 fork the ultimate in responsiveness and damping. The preload ring (available as standard on Six Days models) makes it easy to adjust spring preload to three levels (standard, +3 mm, +6 mm), without the need for tools.

rear suspension

a true KTM trademark, the PDS shock absorber is connected directly to the upper part of the swingarm. As a result, engineers were able to mount it in the most appropriate position for even more progressive damping. As the shock absorber has been moved closer to the central axis, the loads exerted on the swingarm and frame are virtually symmetrical. This also frees up space for the exhaust system. The second piston, combined with a cup-shaped limit stop (instead of a needle-type one) and supported by a progressive-action spring, guarantees excellent resistance to bottoming. With its various machined and anodized components and its characteristic WP color scheme, this ultra-sophisticated shock absorber makes a strong impression compared to less well finished competing products.

brakes

more responsive, more efficient and more powerful than ever, Brembo calipers will cope with any situation. These little jewels of technology are combined with Wave brake discs, renowned for their lightness. The stainless-steel front brake hose features effective protection and a cable guide for the speedo wire. Optimum braking power is a must when you intend to push your machine.

fuel tank

the ultra-light polyethylene fuel tank has a capacity of 9.25 liters. EXC TPI models feature an integrated fuel pump system and an additional, practical fuel level indicator to prevent running out of fuel.

air filter housing

the air filter housing has been designed to protect the air filter from clogging and ensure optimum air flow. The cage in which the extra-large Twin Air filter is housed is totally rigid, helping to hold the system in place. The design is so simple that you could replace the filter even with your face covered in mud. And without the need for any tools. And in a matter of seconds.

handlebars

when it comes to handlebars, KTM engineers have always known which way to go. This NEKEN handlebar, with its high-strength aluminum profile, is no exception. It features a throttle control (with two cables for EXC TPI models, as for their 4-stroke counterparts), a new double-cable aluminum handlebar, and an ultra-simple guard adjustment system. right: a vulcanized handle; left: the ODI lock-on handle, as comfortable as it is practical, thanks to its glue- and wire-free mounting system. All models can be fitted with a handlebar-mounted ignition curve selector (retrofit) to change engine mapping.

footrests

sophisticated "zero-dirt" footrests prevent the gear selector from getting dirty, even when passing through deep ruts. To enhance ground clearance, the gear selector on Enduro models is 6 mm higher than on SX models. But you're free to change it if you like.

saddle

tailored to provide a comfortable support surface for enduro riding, this ultra-strong saddle lets you tackle any terrain with disconcerting control and minimal fatigue all day long.

styling and graphics

in the colors of the Chilean flag, the KTM 250 EXC SIX DAYS TPI features the same front and rear shells as the rest of the highly successful enduro range. This guarantees maximum stability and minimum weight, thanks to a well-thought-out structure and assembly. The clever mounting of the brake hose on the front cross plate also reduces wear and tear.

software and electronics

the latest control unit inaugurated by the KTM 300 EXC TPI has been carried over to the KTM 250 EXC TPI, but with a completely new wiring harness. KTM EXC TPI models feature one of the most advanced engine management systems ever designed for a 2-stroke motocross bike. Ignition timing is calculated by the control unit. The precise amount of fuel to be injected depends on sensor readings such as ambient and intake air pressure, throttle position and water temperature.

News and media credits: KTM