STEP INTO THE BIG LEAGUES

2025 KTM 85 SX 17/14

Find a dealer
Book a Testride
Testride
Find a dealer

2025 KTM 85 SX 17/14

  • Choose Colour
Ready to step up into the big leagues? The 2025 KTM 85 SX is ready to take you there. Developed on track and at an international level, the KTM 85 SX boasts significantly enhanced handling, improved power delivery, and notable enhancements in race pace over longer distances. All said - the KTM 85 SX is 100% READY TO RACE.
  • PHO_BIKE_90_RE_MY-25-KTM-85SX-17-90-RIGHT_#SALL_#AEPI_#V1.png
    PHO_BIKE_90_LI_MY-25-KTM-85SX-17-90-left_#SALL_#AEPI_#V1.png
    PHO_BIKE_90_REVO_MY-25-KTM-85SX-17-90-front-RIGHT_#SALL_#AEPI_#V1.png
Ready to step up into the big leagues? The 2025 KTM 85 SX is ready to take you there. Developed on track and at an international level, the KTM 85 SX boasts significantly enhanced handling, improved power delivery, and notable enhancements in race pace over longer distances. All said - the KTM 85 SX is 100% READY TO RACE.
  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

PUMPED UP!
PUMPED UP!

Adjustable Suspension

Either end of the 2025 KTM 85 SX's WP XACT suspension is adjustable. Upfront, the WP XACT AER fork can be easily adjusted with the use of an air pump. This allows riders to tailor the KTM 85 SX to their specifications, weight, or track conditions. At the rear, the new WP XACT monoshock is fully adjustable for preload, compression, and rebound.

RACER, START YOUR ENGINE!
RACER, START YOUR ENGINE!

Ignition

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 2025 KTM 125 SX. Thanks to a 12.8V 2 Ah lithium ion battery is placed under the rider's seat, a high-quality stator & pickup and super robust design, the only thing you'll be kicking - is ass.

LIGHT IT UP!
LIGHT IT UP!

Combustion Chamber

The 2025 KTM 85 SX boasts a redesigned combustion chamber with a new, smaller spark plug. This makes for more effective and efficient combustion, reducing the compression ratio generating more power and torque.

Before The Gate
PUMPED UP!
PUMPED UP!

Adjustable Suspension

Either end of the 2025 KTM 85 SX's WP XACT suspension is adjustable. Upfront, the WP XACT AER fork can be easily adjusted with the use of an air pump. This allows riders to tailor the KTM 85 SX to their specifications, weight, or track conditions. At the rear, the new WP XACT monoshock is fully adjustable for preload, compression, and rebound.
PUMPED UP!
Before The Gate
RACER, START YOUR ENGINE!
RACER, START YOUR ENGINE!

Ignition

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 2025 KTM 125 SX. Thanks to a 12.8V 2 Ah lithium ion battery is placed under the rider's seat, a high-quality stator & pickup and super robust design, the only thing you'll be kicking - is ass.
RACER, START YOUR ENGINE!
Before The Gate
LIGHT IT UP!
LIGHT IT UP!

Combustion Chamber

The 2025 KTM 85 SX boasts a redesigned combustion chamber with a new, smaller spark plug. This makes for more effective and efficient combustion, reducing the compression ratio generating more power and torque.
LIGHT IT UP!
Start Strong

02. Start Strong

POWERED ON
POWERED ON

Engine

Give your KTM 125 SX more bite with a 125 Factory Performance Kit. Comprising of upgraded engine parts, FMF exhaust, and special engine mapping, it provides a strong power increase across the rpm range.

MORE POWER
MORE POWER

Factory Performance Kit

With EFI comes great rideability. Along with the electronic fuel injection is an electronic power valve on the KTM 125 SX, allowing for more usable power throughout the rev range. Smoother power means better traction. Better traction means holeshot heaven!

MORE BRAAAAP!
MORE BRAAAAP!

Exhaust

Designed to churn out torque the 2025 KTM 125 SX is set to continue its dominance in its class with unrelenting forward momentum. With an overal engine weight of just 39.3 lb (17.86 kg) and impressive horsepower figures, this lightweight powerplant retains its typical high-revving character, while laying down the grunt where it matters most.

SHIFTIN' GEARS
SHIFTIN' GEARS

Shifting Mechanism

Clicking into gear is made even smoother for 2025, with an update to the shift drum. Thanks to the new coating finish, shifting up and down the 'box is smoother, more reliable, and rock-solid even after many hours of use.

Start Strong
POWERED ON
POWERED ON

Engine

Give your KTM 125 SX more bite with a 125 Factory Performance Kit. Comprising of upgraded engine parts, FMF exhaust, and special engine mapping, it provides a strong power increase across the rpm range.
POWERED ON
Start Strong
MORE POWER
MORE POWER

Factory Performance Kit

With EFI comes great rideability. Along with the electronic fuel injection is an electronic power valve on the KTM 125 SX, allowing for more usable power throughout the rev range. Smoother power means better traction. Better traction means holeshot heaven!
MORE POWER
Start Strong
MORE BRAAAAP!
MORE BRAAAAP!

Exhaust

Designed to churn out torque the 2025 KTM 125 SX is set to continue its dominance in its class with unrelenting forward momentum. With an overal engine weight of just 39.3 lb (17.86 kg) and impressive horsepower figures, this lightweight powerplant retains its typical high-revving character, while laying down the grunt where it matters most.
MORE BRAAAAP!
Start Strong
SHIFTIN' GEARS
SHIFTIN' GEARS

Shifting Mechanism

Clicking into gear is made even smoother for 2025, with an update to the shift drum. Thanks to the new coating finish, shifting up and down the 'box is smoother, more reliable, and rock-solid even after many hours of use.
SHIFTIN' GEARS
Calm Under Fire

03. Calm Under Fire

FLUID RIDER MOTION
FLUID RIDER MOTION

Ergonomics

Meet the 2025 KTM 85 SX in a dark alley, and you'd be forgiven for thinking it was one of its bigger siblings. With a carefully scaled-down design that mimics that of the full-sized KTM SX range, this little weapon has unparalleled aesthetic appeal. What's more, it also provides young riders with an exceptional riding experience and sensation, getting them ready to step up to the big leagues.

FULLY FUELED
FULLY FUELED

Tank

A new tank design works together with the new frame concept and bodywork, providing the ideal support for young knees to grip, and 1.42 gallons (5.4 liters) of screaming fury to rip.

IN TOUCH WITH THE RIDER
IN TOUCH WITH THE RIDER

Pegs and Bars

Grab a hold and step on up! Tapered black Neken-branded handlebars are made of high-quality aluminum alloy ensuring top stability, vibration damping, and safety, while all-new, "no-dirt" designed footrests offer a bigger surface area to step on while being less susceptible to hooking on deep ruts, and take-offs when scrubbing. The result? Better control, more leverage and more to hold onto when charging down the holeshot.

Calm Under Fire
FLUID RIDER MOTION
FLUID RIDER MOTION

Ergonomics

Meet the 2025 KTM 85 SX in a dark alley, and you'd be forgiven for thinking it was one of its bigger siblings. With a carefully scaled-down design that mimics that of the full-sized KTM SX range, this little weapon has unparalleled aesthetic appeal. What's more, it also provides young riders with an exceptional riding experience and sensation, getting them ready to step up to the big leagues.
FLUID RIDER MOTION
Calm Under Fire
FULLY FUELED
FULLY FUELED

Tank

A new tank design works together with the new frame concept and bodywork, providing the ideal support for young knees to grip, and 1.42 gallons (5.4 liters) of screaming fury to rip.
FULLY FUELED
Calm Under Fire
IN TOUCH WITH THE RIDER
IN TOUCH WITH THE RIDER

Pegs and Bars

Grab a hold and step on up! Tapered black Neken-branded handlebars are made of high-quality aluminum alloy ensuring top stability, vibration damping, and safety, while all-new, "no-dirt" designed footrests offer a bigger surface area to step on while being less susceptible to hooking on deep ruts, and take-offs when scrubbing. The result? Better control, more leverage and more to hold onto when charging down the holeshot.
IN TOUCH WITH THE RIDER
Hit The Big Stuff

04. Hit The Big Stuff

BRINGING THE BACKBONE
BRINGING THE BACKBONE

Frame

For 2025, the KTM SX and SX-F range has given the WP XACT AER fork and WP XACT rear shock an update. This means you'll be lining up at the starting gate with re-tuned settings, reduced weight, improved weight distribution, and an increase in overall response.

RIGID REINFORCEMENT
RIGID REINFORCEMENT

Subframe

Now pay attention; this is a mouthful - 1-piece polyamide glass-fiber-reinforced aluminum. That's what the subframe is constructed from, for good reason. Not only does this reduce the weight of the whole construction, but it also features specifically engineered rigidity, delivering outstanding handling and rider feedback. It also makes for the perfect spot for integrated electronics, seat support, and hour meter mounting position. 

UNFLAPPABLE FRONT END
UNFLAPPABLE FRONT END

WP XACT Fork

Featuring the latest in suspension technology, the 2025 KTM 85 SX is fitted with a state-of-the-art WP XACT AER fork. These ultra-lightweight, 43 mm USD forks feature exceptional damping and comfort, allowing the rider to push the limit confidently.

TRACK SMOOTHER
TRACK SMOOTHER

WP XACT SHOCK

Mirroring the latest technology found in the full-size motocross range, the 2025 KTM 85 SX features an all-new fully adjustable WP XACT monoshock. This is perfectly matched to the front forks, bringing ideal balance and damping characteristics, along with improved traction, a more planted feel, and control at speed.

RACING ON RAILS
RACING ON RAILS

Wheels and Tires

Keeping the 2025 KTM 85 SX tracking is a set of Black Excel-branded rims and CNC machined hubs fitted with MAXXIS MAXXCROSS MX-ST tires. Not only does this combination deliver outstanding performance on a variety of terrain, but the pattern design and rubber compound deliver exceptional straight-line stability and excellent traction. As always, the KTM 85 SX is available for order with two rims sizes -19/16 and 17/14.

Hit The Big Stuff
BRINGING THE BACKBONE
BRINGING THE BACKBONE

Frame

For 2025, the KTM SX and SX-F range has given the WP XACT AER fork and WP XACT rear shock an update. This means you'll be lining up at the starting gate with re-tuned settings, reduced weight, improved weight distribution, and an increase in overall response.
BRINGING THE BACKBONE
Hit The Big Stuff
RIGID REINFORCEMENT
RIGID REINFORCEMENT

Subframe

Now pay attention; this is a mouthful - 1-piece polyamide glass-fiber-reinforced aluminum. That's what the subframe is constructed from, for good reason. Not only does this reduce the weight of the whole construction, but it also features specifically engineered rigidity, delivering outstanding handling and rider feedback. It also makes for the perfect spot for integrated electronics, seat support, and hour meter mounting position. 
RIGID REINFORCEMENT
Hit The Big Stuff
UNFLAPPABLE FRONT END
UNFLAPPABLE FRONT END

WP XACT Fork

Featuring the latest in suspension technology, the 2025 KTM 85 SX is fitted with a state-of-the-art WP XACT AER fork. These ultra-lightweight, 43 mm USD forks feature exceptional damping and comfort, allowing the rider to push the limit confidently.
UNFLAPPABLE FRONT END
Hit The Big Stuff
TRACK SMOOTHER
TRACK SMOOTHER

WP XACT SHOCK

Mirroring the latest technology found in the full-size motocross range, the 2025 KTM 85 SX features an all-new fully adjustable WP XACT monoshock. This is perfectly matched to the front forks, bringing ideal balance and damping characteristics, along with improved traction, a more planted feel, and control at speed.
TRACK SMOOTHER
Hit The Big Stuff
RACING ON RAILS
RACING ON RAILS

Wheels and Tires

Keeping the 2025 KTM 85 SX tracking is a set of Black Excel-branded rims and CNC machined hubs fitted with MAXXIS MAXXCROSS MX-ST tires. Not only does this combination deliver outstanding performance on a variety of terrain, but the pattern design and rubber compound deliver exceptional straight-line stability and excellent traction. As always, the KTM 85 SX is available for order with two rims sizes -19/16 and 17/14.
RACING ON RAILS
Maintaining Momentum

05. Maintaining Momentum

PRECISE, LAP AFTER LAP
PRECISE, LAP AFTER LAP

Radiators

The 2025 KTM 85 SX features new state-of-the-art radiators produced by Pankl, inspired by the full-size SX concept. These feature the same design, albeit shortened to fit the 85cc needs and size, and work to ensure the engine is running at optimal temperatures when being ripped around the track, lap after lap.

BREATH IN DEEP
BREATH IN DEEP

Airbox and Filter

A new airbox concept has been designed with precisely positioned inlet ducts to prevent air deformation, ensuring maximum airflow and filter protection. The Twin Air filter can be easily accessed without tools by removing the left side panel. 

Maintaining Momentum
PRECISE, LAP AFTER LAP
PRECISE, LAP AFTER LAP

Radiators

The 2025 KTM 85 SX features new state-of-the-art radiators produced by Pankl, inspired by the full-size SX concept. These feature the same design, albeit shortened to fit the 85cc needs and size, and work to ensure the engine is running at optimal temperatures when being ripped around the track, lap after lap.
PRECISE, LAP AFTER LAP
Maintaining Momentum
BREATH IN DEEP
BREATH IN DEEP

Airbox and Filter

A new airbox concept has been designed with precisely positioned inlet ducts to prevent air deformation, ensuring maximum airflow and filter protection. The Twin Air filter can be easily accessed without tools by removing the left side panel. 
BREATH IN DEEP

Technical Details

Engine

  • Primary drive 20:64
  • Transmission 6-speed
  • Secondary gear ratio 13:46
  • Starter Kickstarter
  • Stroke 48.95 mm
  • Bore 47 mm
  • Clutch Wet, multi-disc clutch, Formula hydraulics
  • Displacement 84.9 cm³
  • Design 1-cylinder, 2-stroke engine
  • Fuel-mixture generation Keihin PWK 28

Chassis

  • Weight (without fuel) 68 kg
  • Tank capacity (approx.) 5.4 l
  • Wheelbase 1.282 mm
  • Front brake disc diameter 240 mm
  • Rear brake disc diameter 220 mm
  • Front brake Disc brake
  • Rear brake Disc brake
  • Chain 428, Non-sealed
  • Frame design Central-tube frame with double-cradle
  • Front suspension XACT 43 WP Upside-Down fork, Ø 43 mm
  • Ground clearance 308 mm
  • Handlebar Tapered aluminum Ø 28/22 mm
  • Rear suspension XACT WP PDS mono shock
  • Seat height 845 mm
  • Silencer Aluminium
  • Steering head angle 63.5 °
  • Rear subframe design Aluminum-reinforced polyamide
  • Suspension travel (front) 278 mm
  • Suspension travel (rear) 289 mm
  • Tyre dimensions (front/rear) 70/100; 90/100
  • Wheels 1.40 x 17"; 1.60 x 14"