2027 KTM 50 SX - K29234

2027 KTM 50 SX

WINNING STARTS HERE

The journey starts here. The first prime platform in the KTM Sportminicycle range will satisfy any youngster's thirst for fun, speed, adventure and that unquenchable desire to learn. The KTM 50 SX is built around an advanced steel frame, housing a powerful engine, a WP XACT AER fork, a WP XACT monoshock, and a advanced hydraulic Formula brake system. Reliability, durability and READY TO RACE aesthetics and spirit means it is the only choice for small kids and the big ones too!

Before The Gate

THE HEART

Carburetor

A proven Dell'Orto type PHBG 19 BS carburetor takes a prime position in producing the goods in the KTM 50 SX, working perfectly in harmony with the engine, exhaust, and air intake design.

FIND THE RIGHT FIT

Adjustablity

Different adjustability options were built into the KTM 50 SX using scientific statistical data and feedback from young racers. Finding the perfect fit for your little ripper is easy thanks to height-adjustable suspension, adjustable handlebar positioning, subframe, and bodywork. This allows the seat height to be adjusted from a low setting of 634 mm up to 682 mm, while the KTM 50 SX comes standard from the factory with a seat height of 653 mm.

GET STARTED

Ignition

A digital ignition with improved processing power makes for a cleaner burn and smoother power delivery. Individual ignition timing across the entire rpm range, just like that found on the full-sized KTM SX range, adds a key advantage. The throttle cable assembly benefits from a new stabilization cap that extends the lifetime of the cable by reducing the risk of kinking and damage.

Start Strong

BRIGHT SPARK

Spark Plug

There's no more worrying about breaking the plug, thanks to the KTM 50 SX featuring a spark plug from BRISK with a longer thread. Also, thanks to this innovation, the part number is printed on the spark plugs for easy reading.

UNMATCHED PERFORMANCE

Performance

The KTM 50 SX features a modern and compact engine using the latest 2-stroke technology. Using a 3-shaft design, the crankshaft is positioned near the center of gravity, which not only benefits mass centralization but also creates the ideal intake angle into the reed valve for top-level performance. For 2026, the transmission shafts are new developments with wider dimensions and several components have been reinforced to enhance durability.

WHOA NELLY!

Power-Reduction Kits

For absolute beginners, the KTM POWERPARTS catalog offers a choice of two power-reduction kits. The first allows for a entry-level, moderate and controllable power reduction to 4hp, with the second permitting more intermediate power kit unleashing 8hp for mid-level riding levels.

RACE-MATIC

Clutch

The KTM 50 SX is fitted with a centrifugal clutch reducing the complexity for younger riders, and helping to boost riding confidence. The multi-disc clutch delivers a precise and predictable power delivery across the RPM range. It can be set to suit rider preferences or track conditions without using any special tools. Also, a reinforced clutch basket provides extra durability, wear, and consistent performance. The clutch itself receives a boost in quality with a high-strength pre-coat and increased tightening torque for reliable fastening of the whole assembly.

BRIGHT SPARK

Spark Plug

There's no more worrying about breaking the plug, thanks to the KTM 50 SX featuring a spark plug from BRISK with a longer thread. Also, thanks to this innovation, the part number is printed on the spark plugs for easy reading.

Calm Under Fire

BUILT TOUGH

Frame

The KTM 50 SX boasts a high-strength chromium molybdenum steel frame design with forged connecting parts integrated into the frame. This together with carefully calculated parameters of longitudinal flex and torsional rigidity, allow tailormade stiffness and an unprecedented quality of the Mini frame. The frame layout features a typical MX design without any cross tube behind the steering head. Like our full-size models, the rear shock mount is separated from the main upper frame tube. The frame also comes with frame protectors as standard.

BREATHE CLEAN

Airbox and Filter

The airbox features a conventional suction sleeve made from a hard-wearing polyamide instead of rubber and a Twin Air filter mounting system that features snap locks for easy and intuitive mounting. The Twin Air filter is also placed under the seat and is easily accessible without any tools by simply removing the seat. It also features improved dirt intrusion resistance, with no more dirt falling into the intake tract when changing the filter.

SLIMMER AND SLEEKER

Ergonomics

Mimicking the full-size KTM SX range, the KTM 50 SX features the same advancements found in the larger KTM SXs. Slimmer, sleeker, and better suited to standing on the pegs, the side panels work much better with young riders' boots, allowing a proper squeezing of the bike when standing up. The front number plate incorporates plastic flaps to protect the lower triple clamps from roost. Speaking of triple clamps, the model spectrum has a fixing mechanism which hikes the lifespan of the steering head bearings thanks to the extra block from dirt and water. The wrench size is also smaller and more practical. The tank spoiler features a bicomponent technology featuring the KTM-specific texture on the upper part. Side number plates are kept as close to the frame as possible, with the general seat line sitting slightly flatter.

GET A GRIP

Handlebars & Grips

Hold on tight! The high-quality, tapered, black handlebar is made of lightweight aluminum alloy and ensures top stability, vibration damping, and control. The bend and profile is designed specifically to meet the needs of young riders, with an ODI grip on the left, and a vulcanized ODI grip on the right-side throttle assembly, adding to the overall quality. A crash pad on the handlebar protects the rider from any rough contact or impact with the bars.

Hit The Big Stuff

STOPPING POWER

Brakes

Featuring the same level of technology offered on the full-size KTM SX range, the 2025 KTM 50 SX is fitted with hydraulic brake calipers and state-of-the-art front and rear waved brake discs. This system ensures advanced braking feel and unmatched stopping performance in all conditions, specifically on wet or muddy tracks, with improved durability and brake pad longevity.

RIP 'N GO!

Wheels & Tires

Rolling off the race rig and into the pit lane, the KTM 50 SX uses lightweight, black anodized, aluminum rims just like the full-size KTM SX range. These provide the highest levels of strength and reliability, while MAXXIS MX-ST tires deliver outstanding performance on any terrain, along with exceptional straight-line stability.

BOOT HOLD

Footpegs

A "no-dirt" footrests offer a bigger surface area for improved grip while standing on the pegs, and are less susceptible to hooking up in deep ruts, take-offs when scrubbing, or track barriers.

RIDE ROUGH

Suspension

Featuring the latest in suspension technology, the KTM 50 SX has an updated state-of-the-art, lightweight 35 mm USD WP XACT AER fork. With 165 mm of wheel travel, the air unit in the left fork leg can also be adjusted easily using an air pump for rider preference, weight, or track conditions. The upgrade means better damping and control and is a step forward for the suspension performance. At the rear, fully-adjustable WP XACT monoshock boasts a mounting point on the frame making it more compact, providing the perfect balance and damping characteristics to match the fork.

Maintaining Momentum

KEEP IN CHECK

Hour Meter

Keep track of engine hours easily, with an hour meter mounted at the same position behind the front number plate - as on the full-size KTM SX models. This makes for easier reading and has a lower risk of dirt and water fowling up the display.

BRING THE BRAAAP!

Exhaust

The exhaust system benefits from the same manufacturing process as the full-size 2-stroke KTM SX range, quality and performance. This has resulted in massive progressions in thermodynamics. Moreover, tighter sealing of the silencer end cap and a rubber between the header pipe and silencer adds another level of quality to the exhaust system. The silencer comes with a black anodized finish and a signature 'Braaaaap!'. Modifications include a flange gasket for better durability.. It is more 'bulletproof' thanks to extra efficient and locally sourced manufacturing at KTM HQ.

STAY COOL

Radiator

The KTM 50 SX has state-of-the-art Pankl radiators inspired by the full-size KTM SX range and features the same basic design with all the hardcore cooling properties. The KTM 50 SX uses one large radiator with more capacity instead of two smaller separate ones. This concept allows for better integration of the radiator into the frame and the tank spoilers to channel air through the cooling fins efficiently. For 2026, a new threaded radiator cap allows easier and faster opening with reduced force.

Harnessing Gravity

Mass Centralization

With a strong focus on mass centralization, KTM SX and KTM SX-F engines are designed to concentrate rotating mass at the core, working in perfect harmony with the chassis. The result is lighter, more agile handling that runs rings around the competition.