THE OPEN CLASS IS IN SESSION

KTM 300 SX

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KTM 300 SX

Maximum power at the least possible weight, amplified by low maintenance costs and smooth, linear power delivery - the 2023 KTM 300 SX is set to take the MX Open category back to school. Churning out more than 57 HP from an engine weighing only 23,9 kg, the KTM 300 SX sets the benchmark when it comes to power to weight ratios. Could the 2023 KTM 300 SX be the new Open Class president?
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Maximum power at the least possible weight, amplified by low maintenance costs and smooth, linear power delivery - the 2023 KTM 300 SX is set to take the MX Open category back to school. Churning out more than 57 HP from an engine weighing only 23,9 kg, the KTM 300 SX sets the benchmark when it comes to power to weight ratios. Could the 2023 KTM 300 SX be the new Open Class president?
  1. Before The Gate
  2. Start Strong
  3. Calm Under Fire
  4. Hit The Big Stuff
  5. Maintaining Momentum
Before The Gate

01. Before The Gate

CLICK INTO ACTION
CLICK INTO ACTION

Easy Suspension Adjustment

Get dialed in! The 2023 KTM SX range boasts totally tool-free suspension setup at both ends. Thanks to an all-new shock absorber design featuring hand-adjustable dual compression control, it allows riders to adjust high- and low-speed settings in a matter of seconds. On the front end, the forks are also easily adjusted thanks to a single air pressure preload valve, as well as through easy access click adjusters for compression and rebound. We'll even throw the air pump in as standard.

NO JETS - ONLY ROCKET SHIPS
NO JETS - ONLY ROCKET SHIPS

Electronic Fuel Injection

Pre-mix gets a remix across the 2-stroke KTM SX range, with electronic fuel injection setting the standard. Now there's no more fiddly jetting setup pre-race, And thanks to the all-new Keihin EFI and reed valve case design, you can be guaranteed of laying down optimal power at any altitude, all of the time.

CHUGGA CHUGGA, RING DING DING!
CHUGGA CHUGGA, RING DING DING!

Electric Start

Picture this; You're 7 laps into an absolute ripper of a race. You miss your line and end up stalling in a deep rut. But you don't sweat it. All you do is press the starter button and you blast off again to take the final flag. This is the reality on the 2023 KTM 300 SX. Thanks to a 12,8V 2 Ah lithium ion battery is placed under the rider’s seat, a new high-quality stator & pickup and super robust design, the only thing you'll be kicking - is ass.

Before The Gate
CLICK INTO ACTION
CLICK INTO ACTION

Easy Suspension Adjustment

Get dialed in! The 2023 KTM SX range boasts totally tool-free suspension setup at both ends. Thanks to an all-new shock absorber design featuring hand-adjustable dual compression control, it allows riders to adjust high- and low-speed settings in a matter of seconds. On the front end, the forks are also easily adjusted thanks to a single air pressure preload valve, as well as through easy access click adjusters for compression and rebound. We'll even throw the air pump in as standard.
CLICK INTO ACTION
Before The Gate
NO JETS - ONLY ROCKET SHIPS
NO JETS - ONLY ROCKET SHIPS

Electronic Fuel Injection

Pre-mix gets a remix across the 2-stroke KTM SX range, with electronic fuel injection setting the standard. Now there's no more fiddly jetting setup pre-race, And thanks to the all-new Keihin EFI and reed valve case design, you can be guaranteed of laying down optimal power at any altitude, all of the time.
NO JETS - ONLY ROCKET SHIPS
Before The Gate
CHUGGA CHUGGA, RING DING DING!
CHUGGA CHUGGA, RING DING DING!

Electric Start

Picture this; You're 7 laps into an absolute ripper of a race. You miss your line and end up stalling in a deep rut. But you don't sweat it. All you do is press the starter button and you blast off again to take the final flag. This is the reality on the 2023 KTM 300 SX. Thanks to a 12,8V 2 Ah lithium ion battery is placed under the rider’s seat, a new high-quality stator & pickup and super robust design, the only thing you'll be kicking - is ass.
CHUGGA CHUGGA, RING DING DING!
Start Strong

02. Start Strong

SMOOTHER POWER DELIVERY
SMOOTHER POWER DELIVERY

EFI + Power Valve

With EFI comes great rideability. Along with the electronic fuel injection, a new Power Valve has also been fitted to the KTM 300 SX, allowing for more usable power throughout the rev range. Smoother power means better traction. Better traction means holeshot heaven!

UNMATCHED PERFORMANCE
UNMATCHED PERFORMANCE

Performance

The new 300 cc 2-stroke powerhouse brings a new choice of weapon into the MX Open category and provides more choice for racers looking for maximum power at the least possible weight. Along with low maintenance costs, 57 hp, and an overall engine weight of just 23,9 kg, the 2023 KTM 300 SX provides pure performance. And then some.

PICK YOUR POWER
PICK YOUR POWER

Selectable Maps

The 2023 KTM 300 SX features a map select switch allowing the racer to switch between 2 engine maps. Map 1 provides a linear, predictable power delivery, while Map 2 gives it the full beans with crisp, explosive power output.

Start Strong
SMOOTHER POWER DELIVERY
SMOOTHER POWER DELIVERY

EFI + Power Valve

With EFI comes great rideability. Along with the electronic fuel injection, a new Power Valve has also been fitted to the KTM 300 SX, allowing for more usable power throughout the rev range. Smoother power means better traction. Better traction means holeshot heaven!
SMOOTHER POWER DELIVERY
Start Strong
UNMATCHED PERFORMANCE
UNMATCHED PERFORMANCE

Performance

The new 300 cc 2-stroke powerhouse brings a new choice of weapon into the MX Open category and provides more choice for racers looking for maximum power at the least possible weight. Along with low maintenance costs, 57 hp, and an overall engine weight of just 23,9 kg, the 2023 KTM 300 SX provides pure performance. And then some.
UNMATCHED PERFORMANCE
Start Strong
PICK YOUR POWER
PICK YOUR POWER

Selectable Maps

The 2023 KTM 300 SX features a map select switch allowing the racer to switch between 2 engine maps. Map 1 provides a linear, predictable power delivery, while Map 2 gives it the full beans with crisp, explosive power output.
PICK YOUR POWER
Calm Under Fire

03. Calm Under Fire

SLEEKER FOR YOU TO SCRUB CLEANER
SLEEKER FOR YOU TO SCRUB CLEANER

Absolute Control

No matter how gnarly the track is, you'll stay in complete control thanks to an all-new frame design that has not only been engineered for longitudinal rigidity but also repositions rotating mass closer to the center of gravity. A new shock mounting also provides improved anti-squat behavior to better traction out of corners, while the footpeg mounting position has moved inwards for less risk of hooking up in deep ruts or when scrubbing jumps.

FLUID RIDER MOTION
FLUID RIDER MOTION

Ergonomics

The 2023 KTM SX and SX-F range feature an entirely new and improved rider triangle, providing improved knee contact - especially when standing on the pegs - with improved gripping surfaces all around. New plastics work to expel mud buildup in wet, muddy conditions, with a new, flatter seat profile and high grip seat cover providing exceptional rider movement and control. The polyamide reinforced aluminum subframe further enhances rider feel and feedback.

HARNESSING GRAVITY
HARNESSING GRAVITY

Mass Centralization

With a major emphasis placed on mass centralization, the 2023 KTM 300 SX engine is designed to centralize rotating mass for optimal operation with the chassis. This results in a lighter, more agile handling feel that simply runs rings around the competition.

Calm Under Fire
SLEEKER FOR YOU TO SCRUB CLEANER
SLEEKER FOR YOU TO SCRUB CLEANER

Absolute Control

No matter how gnarly the track is, you'll stay in complete control thanks to an all-new frame design that has not only been engineered for longitudinal rigidity but also repositions rotating mass closer to the center of gravity. A new shock mounting also provides improved anti-squat behavior to better traction out of corners, while the footpeg mounting position has moved inwards for less risk of hooking up in deep ruts or when scrubbing jumps.
SLEEKER FOR YOU TO SCRUB CLEANER
Calm Under Fire
FLUID RIDER MOTION
FLUID RIDER MOTION

Ergonomics

The 2023 KTM SX and SX-F range feature an entirely new and improved rider triangle, providing improved knee contact - especially when standing on the pegs - with improved gripping surfaces all around. New plastics work to expel mud buildup in wet, muddy conditions, with a new, flatter seat profile and high grip seat cover providing exceptional rider movement and control. The polyamide reinforced aluminum subframe further enhances rider feel and feedback.
FLUID RIDER MOTION
Calm Under Fire
HARNESSING GRAVITY
HARNESSING GRAVITY

Mass Centralization

With a major emphasis placed on mass centralization, the 2023 KTM 300 SX engine is designed to centralize rotating mass for optimal operation with the chassis. This results in a lighter, more agile handling feel that simply runs rings around the competition.
HARNESSING GRAVITY
Hit The Big Stuff

04. Hit The Big Stuff

GRIP AND LET RIP
GRIP AND LET RIP

Traction

Ready to rip your arms out of the sockets? Together with the benefits of mass centralization and overall reduced weight, the anti-squat behavior of the chassis is significantly improved by changing the backbone of the steel frame concept. In layman's terms, the 2023 KTM 300 SX gets its power down perfectly when tearing out of corners.

UNFLAPPABLE FRONT END
UNFLAPPABLE FRONT END

WP XACT Fork

48mm air type WP XACT front fork with a split damping function provides all the confidence you need to attack the track. New hydrostops in the fork legs improve bottoming-out resistance and account for less rebound when attacking big jumps, bumps, and thumps. Redesigned fork protection rings also increase protection against dirt, making them as reliable as they are awesome.

RACING ON RAILS
RACING ON RAILS

Stability

The 2023 KTM 300 SX is rock-solid at any speed thanks to a repositioned and forged steering head connection and CNC milled triple clamps. Made from high-grade aluminum, these feature optimally tuned steering stem stiffness, perfect alignment of the fork tubes, and precise geometry of the fork clamps to ensure highly responsive and smooth fork action - not to mention unwavering stability when charging across ruts and onto the podium.

Hit The Big Stuff
GRIP AND LET RIP
GRIP AND LET RIP

Traction

Ready to rip your arms out of the sockets? Together with the benefits of mass centralization and overall reduced weight, the anti-squat behavior of the chassis is significantly improved by changing the backbone of the steel frame concept. In layman's terms, the 2023 KTM 300 SX gets its power down perfectly when tearing out of corners.
GRIP AND LET RIP
Hit The Big Stuff
UNFLAPPABLE FRONT END
UNFLAPPABLE FRONT END

WP XACT Fork

48mm air type WP XACT front fork with a split damping function provides all the confidence you need to attack the track. New hydrostops in the fork legs improve bottoming-out resistance and account for less rebound when attacking big jumps, bumps, and thumps. Redesigned fork protection rings also increase protection against dirt, making them as reliable as they are awesome.
UNFLAPPABLE FRONT END
Hit The Big Stuff
RACING ON RAILS
RACING ON RAILS

Stability

The 2023 KTM 300 SX is rock-solid at any speed thanks to a repositioned and forged steering head connection and CNC milled triple clamps. Made from high-grade aluminum, these feature optimally tuned steering stem stiffness, perfect alignment of the fork tubes, and precise geometry of the fork clamps to ensure highly responsive and smooth fork action - not to mention unwavering stability when charging across ruts and onto the podium.
RACING ON RAILS
Maintaining Momentum

05. Maintaining Momentum

UNOBTRUSIVE IMPACT
UNOBTRUSIVE IMPACT

Energy absorption

Besides the expertly crafted, hydro-formed, laser-cut, and robot-welded frame being engineered to provide exceptional rider feedback and straight-line stability, it consists of specifically calculated parameters of longitudinal and torsional flex. This means the frame acts as a "shock absorber" of sorts, making for a less harsh ride, resulting in less rider fatigue over many hard laps.

NOTHING TO HOLD YOU BACK
NOTHING TO HOLD YOU BACK

Ground clearance

No one enjoys a bad hook-up. Luckily, the all-new frame and shock absorber geometry on the 2023 KTM 300 SX improve ground clearance of the linkage, with all-new topology optimized die-cast footpegs that are less susceptible to hooking on deep ruts, and take-offs when scrubbing.

PRECISE, LAP AFTER LAP
PRECISE, LAP AFTER LAP

Consistency

A new WP XACT shock absorber provides unmatched consistency lap after lap, thanks to low-friction SKF linkage seals and advanced damping characteristics for unsurpassed traction and energy absorption.

Maintaining Momentum
UNOBTRUSIVE IMPACT
UNOBTRUSIVE IMPACT

Energy absorption

Besides the expertly crafted, hydro-formed, laser-cut, and robot-welded frame being engineered to provide exceptional rider feedback and straight-line stability, it consists of specifically calculated parameters of longitudinal and torsional flex. This means the frame acts as a "shock absorber" of sorts, making for a less harsh ride, resulting in less rider fatigue over many hard laps.
UNOBTRUSIVE IMPACT
Maintaining Momentum
NOTHING TO HOLD YOU BACK
NOTHING TO HOLD YOU BACK

Ground clearance

No one enjoys a bad hook-up. Luckily, the all-new frame and shock absorber geometry on the 2023 KTM 300 SX improve ground clearance of the linkage, with all-new topology optimized die-cast footpegs that are less susceptible to hooking on deep ruts, and take-offs when scrubbing.
NOTHING TO HOLD YOU BACK
Maintaining Momentum
PRECISE, LAP AFTER LAP
PRECISE, LAP AFTER LAP

Consistency

A new WP XACT shock absorber provides unmatched consistency lap after lap, thanks to low-friction SKF linkage seals and advanced damping characteristics for unsurpassed traction and energy absorption.
PRECISE, LAP AFTER LAP

Technical Details

Engine

  • Transmission 5-speed
  • Starter Electric starter
  • Stroke 72 mm
  • Bore 72 mm
  • Clutch Wet, DDS multi-disc clutch, Brembo hydraulics
  • Displacement 293.2 cm³
  • EMS Vitesco Technologies EMS
  • Design 1-cylinder, 2-stroke engine

Chassis

  • Weight (without fuel) 99.4 kg
  • Tank capacity (approx.) 7.2 l
  • Front brake disc diameter 260 mm
  • Rear brake disc diameter 220 mm
  • Front brake Disc brake
  • Rear brake Disc brake
  • Chain X-Ring 5/8 x 1/4"
  • Frame design Central double-cradle-type 25CrMo4 steel
  • Front suspension WP XACT-USD, Ø 48 mm
  • Ground clearance 354 mm
  • Rear suspension WP XACT Monoshock with linkage
  • Seat height 958 mm
  • Steering head angle 63.9 °
  • Suspension travel (front) 310 mm
  • Suspension travel (rear) 300 mm