350 SX-F 2021

ALL-IN-ONE

AGILE ATHLETE

BRING IT ON

ELECTRIFYING

HIS COOLNESS

• ENGINE

  The engine of the 350 SX-F features a compact and very light (27.2kg) construction. Its DOHC (double overheard camshaft) design with lightweight titanium valves and DLC coated finger followers allows ...

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  ...for lively but strong engine characteristics. Fitted with the latest electronic fuel injection system and electric starter, it has an extremely wide usable speed range, high performance and incredibly efficient rideability. The 350 SX-F engine shares the same layout as the one in the 250 SX-F, its playful handling similar to a 250 machine resulting mainly from reducing the moving masses to a minimum.

• 

  CYLINDER HEAD

  The cylinder head features two overhead camshafts with friction-optimized finger followers boasting a DLC coating and high-flow ports. Four lightweight titanium valves maximize the flow rate for an op...

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  ...timal power band and outstanding performance across the seemingly endless rev range of 13,400rpm, power peaking at 58hp. New lateral brackets now made of aluminum instead of steel allow an efficient fixation of the engine to the frame and cut any excess weight.

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  CRANKSHAFT

  The 350 SX-F’s crankshaft utilizes a short connecting rod, which makes for an overall compact and lightweight engine with a snappy power delivery. A plain big-end bearing with two force-fitted bearing...

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  ... shells runs directly on the crank pin. This design is a major prerequisite for the extremely high engine speeds and the unrivaled maximum power of the 350cm3 engine. Not only that, it also enhances the engine’s durability, allowing long crankshaft service intervals – a customer benefit in respect of time, effort and cost.

• 

  ENGINE MANAGEMENT SYSTEM

  The state-of-the-art Keihin Engine Management System with electronic fuel injection features a 44mm throttle body. Thanks to its unique injector position, the engine’s response is instantaneous. And t...

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  ...o make life even easier, separate systems for cold starts and idle adjustment await you. The lightweight ECU features a unique traction and launch control system for lightning-quick response when the bar drops and maximized grip thanks to different maps that sync with to the gear you’re in. As an ultimate bonus, the rider can unleash an even more powerful mapping via the handlebar map switch.

• 99.8 kg

  The main target for the KTM engineers when developing the SX models was a massive weight reduction compared to the previous generation. The result: the current SX-F models are the slimmest, lightest b...

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  ...ikes in the competition, even though the 4-strokes are equipped with an electric starter as a standard feature, while the competition still needs to be kick started. You can focus on kicking ass.

• 

  FRAME

  The high-tech, lightweight chrome-moly steel frame has a knack for easy handling, outlandish rideability, precise cornering and excellent stability. You can also count on high torsional rigidity and l...

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  ...ow longitudinal stiffness. This results in better absorption of the energy created from the front and rear suspension, sucking up jumps and bumps. In short: more comfort and less rider fatigue. Laterally attached, lightweight aluminum engine head stays (the connection between cylinder head and frame) contribute to more precise cornering and a reduced vibration level. The engineers were able to pull off all that, while making their frame a big fat kilogram lighter than that of the lightest competitor on the market. In addition, it is easier to maintain, easier to work on and supplies more space for the tank and other components. The bike also features an extra-light subframe made of stable aluminum profiles, which tiptoes the scales at less than 900g.

• 

  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 MY2017 EXC models, which are 6m...

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  ...m higher than the SX versions.

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  AIRBOX

  The airbox design offers maximum protection of the air filter against soiling, while ensuring maximum airflow. The large twin-air filter is mounted in a stiff cage, which at the same time holds the sy...

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  ...stem in place. This design is so simple, you could still pop a fresh one in with a face full of mud. Without tools. In seconds.

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  MONOSHOCK

  The WP monoshock has been developed with the entire frame and swingarm architecture in mind, including the linkage system and the WP AER 48 front forks. It features machined and black anodized compone...

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  ...nts and is a valuable, high-end product compared to roughcast reservoirs. A new setting and a softer spring perfectly match the reworked front-end set-up and its sparkling WP color scheme lets everyone know you have excellent taste in suspension.

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  FORKS

  The lightweight WP AER 48 front fork, a 48mm USD air-sprung fork developed by WP in close collaboration with KTM, is a split fork with separate functions for each leg. That means damping functions are...

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  ... on the right side, whereas the air spring is in the left. This left leg features a two-chamber system with a capsuled air cartridge to prevent loss of air pressure. Should the outer seal start to leak, the internal cartridge pressure will keep the bike in position. The air spring is easy to adjust to any rider weight via a single air valve. No special tools are required; the air pump supplied with the bike will do just fine. The right fork leg integrates a damping cartridge that tailors to all your damping needs. It can be adjusted to the track conditions and the rider’s preferences with a twist of a dial (compression from the top, rebound from the bottom, 30 clicks each). For MY2017, the AER 48 also features redesigned outer tubes with better bending characteristics, smoother operation and less friction. Plus: they’ve lost some weight (265g). Right off the dealer floor, these forks are more comfortable and more sensitive than ever. But you can still hammer the hell out of them.

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  TRIPLE CLAMP

  Top quality, CNC machined triple clamps have been something of a KTM trademark for years. Ensuring a precise handling, they perceptibly support the flex characteristics, and with it the action of the ...

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  ...forks. For MY2017, the upper triple clamp specifically features a redesign in conjunction with the new fork tubes. The rubber damped handlebar fixation has also been reworked and the lower handlebar clamps are now separated, while on the upper side a new bridge-type clamp guarantees more torsional stiffness and can easily be replaced in case it gets twisted due to a crash. In addition, an hour meter is fitted at the upper triple clamp in order to let the rider know it’s time for a service. Or a cold drink.

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  HANDLEBAR MAP SWITCH

  All 4-stroke models are equipped with a sophisticated new multi-functional handlebar map switch, which does three things:·        Activation of the traction control·        Activation of the launch co...

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  ...ntrol·        Selection of an alternative power curve (Standard or Advanced), The traction control is a unique feature none of the competitors can offer so far. It guarantees more efficient traction and better control of the bike when accelerating. You’ll especially notice this on a rainy day. Push the button and reign supreme. With this map switch the rider can also activate the launch control, which provides more efficient starts out of the gate so you can go for the hole shot, time and time again. How? It simply reduces the maximum engine speed for the very first moment of the start, in order to give you better control. Push both buttons when the engine idles and the EFI control lamp mounted on the upper triple clamps will let you know your bomb is live. In addition, the map switch gives the rider the chance to select an alternative, more powerful map beside the standard configuration. Don’t you just love the idea of a boost button?

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  BATTERY AND WIRING HARNESS

  All SX-F engines are fitted with the proven electric starter – a unique KTM feature and a major benefit at all levels of motocross racing. A super compact and lightweight 495g Lithium-Ion starter batt...

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  ...ery breathes life into the engine and contributes to low vehicle weight. The battery and wiring harness are centralized in a compartment above the airbox, allowing the mechanic to remove the subframe without getting in conflict with the electrics. Because a happy mechanic, is a good mechanic.

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  ELECTRIC STARTER

  Like all KTM 4-stroke motorcycles, the 350 SX-F is started at the push of a button - a priceless advantage when you’re on the clock.

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  BODYWORK

  KTM R&D, Kiska Design and all our factory riders had their say in shaping the plastics. Their goal: complete harmony between rider and bike. And so it turned out. Perfect ergonomics and contact points...

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  ..., maximum freedom of movement, a low seat height and sweet comfort, especially in the rear part of the seat. The I-beam structures of the front and rear fenders are prime examples of such an intelligent design, guaranteeing maximum stability and a low weight thanks to well thought-out construction and mounting. Plus: they stay cleaner for longer.

• 

  GRAPHICS

  A new, tailor-made kit, fit for a king. Because in this sport, champs deserve to look the part regardless of the dirt.