2015 KTM 250 SX-F
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ID # 13247171
- Back ID:13247171
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The 250 SX-F has been an established force in the MX2 World Championship for years now. In addition to the world title, it also won the prestigious AMA Supercross Lite Championship in 2013. All over the world, in both professional and amateur classes, the 2013 motorsport season was very successful for the 250 SX-F - and the 2014 season promises to be no different. In MY 2015, the feisty 4-stroke hits the scene with further improvements to engine and chassis – a performance package that will continue to dominate the MX2 class. |
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TOP ERGONOMICS |
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BODYWORK
 KTM engineers have focussed on designing the bodywork ergonomically and functionally in such a way that the whole motorcycle is in perfect harmony with the rider down to the very last detail. The front fender is a perfect example of how moulded plastic components can gain maximum stability with a well thought out structure and well-conceived attachment. GRAPHICS A new, refined graphic design with clear lines underlines the high demands made of a modern, state-of-the-art offroad motorcycle. |
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SEAT
 The ergonomically perfectly designed seat is equipped with a durable foam core, ensuring both adequate comfort and high stability. |
AIRBOX
 At the same time, the design of the airbox guarantees optimum protection of the air filter from dirt plus maximum air throughput for the highest performance. Quick replacement of the twin-air filter - without tools and in a matter of seconds - has long since been an unrivalled KTM standard. |
FUEL TANK
 All models in the SX range are equipped with a 7.5 litre, lightweight polyethylene fuel tank. The fuel pump system used on the 4-stroke motocross models is the same as that used on the 4-stroke enduro models, thereby allowing optional fitting of larger tanks from the PowerParts range or from the enduro models. |
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HANDLEBAR
 All SX models are equipped with the extremely sturdy, tapered Renthal Fatbar 827 handlebar that features an offset specially designed to meet the demands of motocross. In accordance with the proven KTM standard, the handlebar can be fixed in a choice of four positions. For MY 2015, it is equipped with softer two-component grips to spare the rider's hands. |
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UNRIVALLED HANDLING |
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WHEELS  The wheels fitted for MY 2015 feature black coated, high-end Excel rims with lightweight, CNC-machined hubs and spokes with lightweight aluminium nipples, allowing highest levels of stability to be achieved, while keeping weight to a minimum. New Dunlop Geomax MX 52 tyres were developed in collaboration with the KTM USA factory team and offer perfect traction with top performance. The new rear sprockets save 50 grams in unsprung mass. |
BRAKES
 High-tech brakes from Brembo have always been standard equipment on KTM offroad bikes and, together with the lightweight wave brake discs, they are the measure of all things in terms of brake technology. As the best brakes in the motocross class, they remain unchanged for MY 2015. |
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BETTER PERFORMANCE |
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ENGINE MANAGEMENT SYSTEM (EMS)  In conjunction with the revolutionary injector position developed by KTM, the Keihin engine management system (EMS), with electronic fuel injection and 44 mm throttle body, ensures spontaneous responsiveness and maximum engine performance. Various engine characteristics can also still be selected via the EMS, with a map-select switch available as a PowerPart. Furthermore, a user-setting tool (also available as an option) allows data to be read from the bike by laptop and the mapping, ignition and fuel injection to be modified in a matter of a few mouse clicks.
COOLING SYSTEM
ENGINE
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CYLINDER HEAD
 The heart of the compact DOHC engine is the state-of-the-art cylinder head with twin overhead camshafts and DLC-coated cam followers – a design allowing the rev "sound barrier" of 14,000 rpm to be achieved. Ducts designed for optimum flow combined with ultra-light titanium valves (intake 32.5 mm, exhaust 26.5 mm) guarantee maximum gas throughput and therefore the highest performance. |
CRANKSHAFT
 The crankshaft on the 250 SX-F is equipped with a plain bearing in the lower conrod eye. Two press-fit bearing shells run directly on the crankshaft's crank pin. This design is a key factor behind the extremely high engine speed and unrivalled peak power of the 250cc engine. It also enhances the durability of the engine, thereby enabling an extension to the service intervals for the crankshaft – a benefit for the customer in terms of time and costs. |
BALANCER SHAFT
 To counterbalance the inertia forces, the 250 SX-F engine is equipped with a balancer shaft that acts as a multi-function shaft, driving timing chain and water pump simultaneously. |
STARTER
 The 250 SX-F engine is equipped as standard with an electric starter – an undisputed benefit when the going gets really tough in the heat of battle, even when a slight weight disadvantage has to be accepted as a consequence. |
CLUTCH
 The very compact CCS (Coil Spring Steel) clutch is equipped with a wear-free steel cage and eight lining discs that are extremely heat-resistant due to the steel base material. The clutch basket has been reworked to make it lighter for MY 2015. The clutch springs are made from a new material that provides more consistent behaviour both in tough conditions and for a longer time. The hydraulic clutch actuation system from Brembo guarantees smooth and very precise clutch control. |
TRANSMISSION
 The lightweight 5-speed transmission excels with extremely precise and simple shifting, so precisely the right gear ratio can be selected effortlessly in every situation. |
PISTON
 The forged piston with a box-in-box design excels with its extra-stiff structure, while keeping weight to a minimum. Thanks to its reduced reciprocating weight, the engine exhibits extremely dynamic characteristics. |
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SUPERIOR CHASSIS |
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FRAME  |
LINKAGE / SHOCK ABSORBER
 The revamped damping system for MY 2015 features a new linkage with optimised geometry. The flatter progression with a higher initial rate ensures greater stability and lowers the rear end. In addition, the new design saves another 40 grams of weight. The fully adjustable WP 5018 shock absorber has been completely retuned to suit the new linkage. |
TRIPLE CLAMPS
 High quality, CNC-machined triple clamps have long since been standard equipment at KTM. They ensure precise handling and provide a perceptible boost to the flexing characteristics and hence the responsiveness of the telescopic fork. The new O-ring carrier for the lower steering head bearing, a revised shaft tube and the new steering head bolt save another 40 grams. FORK The fully adjustable upside-down fork from WP Suspension has been perfectly tuned to the new rear wheel damping system and the new 22 mm front axle (formerly 26 mm) for MY 2015. The new axle provides a better feel for the front wheel and also saves a further 40 grams. The new fork stubs now feature an offset of 33 mm instead of 35 mm, which together with increased trail deliver greater ride stability. Furthermore, they accommodate newly developed, 50 gram lighter fork protectors. |
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