In layman’s terms, the 2025 KTM 450 SX-F gets its power down perfectly when tearing out of corners.
Review – Key Features – Features & Benefits – Specifications
2025 KTM 450 SX-F: TOP OF THE FOODCHAIN.
Introducing the 2025 KTM 450 SX-F…
When you see the 2025 KTM 450 SX-F roll off the trailer, you know it means business. With 5 AMA 450 Supercross titles in the last 7 seasons, the 2025 KTM 450 SX-F rolls up to the starting gate already armed with the learnings of past championships – only this time, it’s freshly loaded with an all-new arsenal of weaponry.
2025 KTM 450 SX-F Totalmotorcycle.com Key Features
4-STROKE DOMINATION
The 2025 4-stroke KTM SX-F stable is bred to dominate. Not only do these machines boast technological intelligence like Launch Control, Traction Control, and a Quickshifter as standard, they can be pushed even further with the addition of the all-new KTM CONNECTIVITY UNIT OFFROAD (CUO). The MX scene has just become a one-horse race.
ULTIMATE RIDER CONNECTION
Available in the KTM PowerParts catalog for the KTM SX-F range, the Connectivity Unit Offroad – or CUO for short – offers a wide range of functionalities and adjustability options via the KTMconnect app. The CUO gives you a new insight into your riding, allows you to alter your engine behavior, and even provides optimized suspension settings based on individual preferences and riding conditions. Welcome to the next level moto.
NEXT LEVEL MOTO
Two years ago the 2023 KTM SX line-up grabbed the holeshot with major updates across the range. For 2025, the KTM SX and SX-F brings even more firepower to the starting gate. Armed and fully loaded with chassis updates and technological advances, the 2025 KTM SX and SX-F range has total championship domination firmly in sight.
EVER-EVOLVING PERFORMANCE
The 2025 KTM Motocross lineup receives its updates directly from the KTM Factory Racing efforts. From a reworked frame to updated tank shrouds and new tires, this is our most advanced range of motocrossers yet.
- Re-worked frame with updated shock mountings and front triangle, including an improved wall thickness.
- Improved engine mounts with cut-outs to enhance chassis flex, reduce weight by 300g, maintain stability, and improve cornering.
- Updated tank shrouds with bi-compound plastics improve radiator airflow and cooling
- Updated chain glider design for improved mud dissipation.
- Upgraded suspension settings at both ends in support of the updated frame and rear linkage, improving weight distribution, stiffness, and response.
- Upgraded rear brake pedal construction for increased stiffness and resistance to bending.
- New fuel tank roll for improved fitment, reducing frame scrubbing, and enhancing durability.
- New Dunlop GEOMAX MX34 Motocross tires as standard.
- Connectivity Unit Offroad is available as KTM PowerParts for the KTM SX-F line-up with a wide range of functionalities via the KTMconnect app.
KTM TAKES RIDER CONNECTION TO THE NEXT LEVEL WITH THE 2025 KTM MOTOCROSS RANGE
In its latest update since the completely revamped 2023 KTM SX range, the 2025 KTM SX and 2025 KTM SX-F range have upped the ante when it comes to rider connection, composure, and control – along with the return of a fan favorite.
Engineered to provide riders with more control than ever before, the 2025 KTM SX and SX-F range brings a series of updates adopted directly from KTM Factory Racing efforts, making this the most READY TO RACE line-up yet.
The frame has received the most significant update share, with visible cutouts and tube-wall thickness changes around the front, engine mounts, and rear shock mounting areas. These changes have been specifically engineered to improve chassis flex characteristics and reduce weight by around 300 g while maintaining overall stability and improving cornering behavior. An updated swingarm with a machined chain glider and an updated rear brake pedal for improved durability round off updates to the frame.
New Dunlop GEOMAX MX34 Motocross tires are standard on the 2025 KTM SX and SX-F models, providing stability and control at the highest level to perform at their best. These feature a new carcass compound that improves damping and absorption, adding up to 30% longer performance. New Progressive Cornering Block Technology improves traction, grip, and mud dissipation.
At the rear, the WP XACT rear shock benefits from an updated linkage with renewed seals and smaller diameter linkage bolts. The setup is taken directly from the KTM Factory Racing Team and is optimized to benefit weight savings and stiffness parameters. To complement the updates at the rear, the WP XACT AER fork features reworked settings to account for more flex and less weight.
Ergonomically, the 2025 KTM SX and SX-F range features new tank shrouds with bi-composite plastics on the upper and lower flanks, providing a fresh, sharp, distinctive new look and improved cooling. This is supported by an updated fuel tank roll that protects the frame against wear from scrubbing and improves tank fitment. Lastly, an updated air inlet sleeve and snorkel design features on the 2025 models. This is now a 1-piece part, preventing deformation through a more robust and stiffer material design.
Above the surface, all-new graphics mirror the new design language of the tank shrouds and hint at the many small technical changes on the 2025 line-up. Full-orange bodywork, red and black in-mold graphics, and a more durable black seat bring a clean look while communicating pure, READY TO RACE intention.
2025 also sees the introduction of the Connectivity Unit Offroad, which is available as KTM PowerParts for the 2025 KTM SX-F line-up. The CUO offers various functionalities and adjustability options via the KTMconnect app. This exists as two parts: the CUO, mounted on the right upper fork between the lower and upper triple clamp, and the GPS sensor on the front fender. A CUO-compatible front fender is also available as a KTM PowerParts option.
At long last, the cherished KTM 150 SX rejoins the 2-stroke stable with much anticipation. The 2025 KTM 150 SX builds upon the foundation of the KTM 125 SX but with a significant overhaul of components. Specifically designed, modified, and rearranged for racers in pursuit of elevated performance, it offers enhanced torque and an enriched riding experience.
The 2025 KTM SX and SX-F models introduce subtle yet significant enhancements to the race paddock, offering the broadest selection of machines designed to meet the needs of every rider and racer.
2025 KTM 450 SX-F Totalmotorcycle.com Features and Benefits
CLICK INTO ACTION
Easy Suspension Adjustment
As always, the suspension boasts an easy tool-free setup at both ends, ensuring you chase down the podium in total control. On the rear, a hand-adjustable dual compression control allows riders to adjust high- and low-speed settings in a matter of seconds. The forks on the front end are also easily adjusted thanks to hand-adjustable clickers on the bottom of the fork shoe and top cap.
BREATHE EASY
Air filter box
Designed to provide maximum airflow, the air filter box is designed with precisely positioned inlet ducts aimed at preventing air deformation and maintaining filter protection. The Twin Air filter and air filter support design feature a simple fail-proof mounting system for secure and accurate filter installation, ensuring the air filter is easily accessed, without tools, by removing the left side panel, for easy track-side maintenance. A vented air filter box cover is also included for all SX and SX-F models in the by-pack.
LESS FOCUS ON THE TOOL, MORE FOCUS ON THE TRACK
Serviceability
The 2025 KTM SX and SX-F range is engineered and designed to provide riders with easy-to-access service parts, as well as suspension adjustability. This allows faster track-side and off-season maintenance, as well as making motocross more accessible for novice riders without pit crews.
UNMATCHED PERFORMANCE
More Usable Power
When the war drums sound and the gate drops, you need to be the first to off the line in a bid to rule the roost. The 2025 KTM 450 SX-F boasts one of the most manic 4-stroke powerplants in the paddock, with its SOHC engine proving to be the perfect example of advanced engineering. With a massive peak power output, and an overall engine weight of only 59 lb (26.8 kg), you’ll leave the competition with more than a little mud on the face.
DROP THE CLUTCH
Launch Control & Quickshifter
Launch control, ENGAGED! Designed for the holeshot, the 2025 KTM SX-F range comes standard with launch control and Quickshifter function, allowing for fast upshifts without using the clutch. Launch control is easily engaged by pressing the traction control and Quickshifter buttons simultaneously and works by limiting the amount of power to the rear wheel, improving traction, and preventing loss of control under hard acceleration. Meanwhile, the Quickshifter function means you can bang through from 2nd to 5th gear with your focus solely on the first corner.
TOTAL TRACTION
Selectable Maps + TC
The map select switch on the 2025 KTM SX models features a simpler design, allowing for easier functionality in switching between 2 engine maps. Map 1 provides a more linear power curve. while map 2 punches all-out with aggressive throttle and explosive power. Luckily, Traction control is easy toggled to an on or off position from the same switch, ensuring maximum traction and a distinct advantage in wet or muddy conditions.
SLEEKER FOR YOU TO SCRUB CLEANER
Absolute Control
Get ready for a full-on berm assault. The 2025 KTM SX and SX-F machines have received major frame updates directly from Factory Racing efforts. For starters, the frame area around the rear shock mount has been updated and made more streamlined, with new engine mounts and cut-outs for improved chassis flex. The front area of the frame is also updated. with a different wall thickness than the previous model year, with renewed engine mounts. This adds up to a 300g weight saving and improved flex for better cornering.
FLUID RIDER MOTION
Ergonomics
Upgraded tank shrouds using bi-compound plastics channel air towards the radiators more efficiently, while a new fuel tank roll, makes for a tighter, more secure fitment, reducing the chance of frame scrubbing and dramatically improving durability. All this works alongside the specially-developed rider triangle, to provide unmatched knee contact and gripping surfaces – especially when standing on the pegs.
UNMATCHED PERFORMANCE
Performance
The 2025 KTM 450 SX-F engine is positioned for optimal mass centralization and an overall lightweight feel, benefiting handling and anti-squat behavior. The silencer offers incredible response in combination with the mapping switch and provides a slightly quieter exhaust note.
Updated Suspension Settings
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.
UNFLAPPABLE FRONT END
WP XACT Fork
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 setting gate with re-tuned settings, reduced weight, improved weight distribution, and an increase in overall response.
WP XACT SHOCK
Keeping things in check at the rear, the WP XACT rear shock has also undergone some changes for 2025 using settings directly from the KTM Factory Racing Teams The improved frame and shock geometry mean more ground clearance at the linkage, making it less susceptible to bottoming out. While we’re on the topic, smaller diameter linkage bolts save weight, while new linkage seals refine rear shock response and advanced damping characteristics.
RACING ON RAILS
Stability
An upgraded rear brake pedal finds its way onto the 2025 KTM Motocross range, adding additional stiffness, bending resistance and braking feel to the overall package. At the other end, a forged steering head connection and CNC-milled triple clamps, make for the perfect alignment of the fork tubes. This precise geometry of the fork clamps ensures highly responsive and smooth fork action – not to mention unwavering stability when charging across ruts and onto the podium.
HARNESSING GRAVITY
Mass Centralization
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 2025 KTM 450 SX-F gets its power down perfectly when tearing out of corners.
Tires
Getting power hooked into the dirt is a tough job. However, hours of research and testing have led the 2025 KTM Motocross range to the Dunlop GEOMAX MX34. Providing unmatched stability and control at the highest level, these rubber hoops feature a new carcass and rubber compound that improves damping and absorption, maintaining performance up to 30% longer. New Progressive Cornering Block Technology also improves grip in the berms, while a new rear pattern with 11% taller and 44% wider center block for increased traction and control everywhere else. Lastly, this unique block arrangement works to dispel mud buildup, ensuring traction in even the muddiest of track conditions.
HARNESSING GRAVITY
Maintaining Momentum
Connectivity Unit Offroad
Available as a PowerPart on the KTM SX-F range, the Connectivity Unit Offroad – or CUO for short – offers a wide range of functionalities and adjustability options via the KTMconnect app. The CUO gives you a new insight into your riding, allows you to alter your engine behavior, and even provides you with optimized suspension settings based on individual preferences and riding conditions. Welcome to the next level moto.
NOTHING TO HOLD YOU BACK
Ground clearance
No one enjoys a bad hook-up. Good thing, then that the shock absorber geometry on the 2025 KTM 450 SX-F improves ground clearance of the linkage, with the topology-optimized die-cast footpegs being less susceptible to hooking on deep ruts, and take-offs when scrubbing.
PRECISE, LAP AFTER LAP
Consistency
A new chain guide and chain guard result in improved durability and minimize the chances of hooking on external objects – especially in extremely muddy conditions while reducing dirt build-up around the swingarm and rear sprocket.
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.
2025 KTM 450 SX-F – Totalmotorcycle.com International Specifications/Technical Details
US MSRP Price: $ TBA USD
Canada MSRP Price: $ TBA CDN
Europe/UK MSRP Price: £ TBA GBP (On The Road inc 20% Vat)
Engine
Transmission 5-speed
Starter Electric starter
Stroke 63.4mm
Bore 95mm
Clutch Wet, DDS multi-disc clutch, Brembo hydraulics
Displacement 449.9cm³
EMS Keihin EMS
Design 1-cylinder, 4-stroke engine
Chassis
Weight (without fuel) 102.6kg
Tank capacity (approx.) 7.2l
Front brake disc diameter 260mm
Rear brake disc diameter 220mm
Front brake Disc brake
Rear brake Disc brake
Chain 520, Non-sealed
Frame design Central double-cradle-type 25CrMo4 steel
Front suspension WP XACT-USD (AER), Ø 48 mm
Ground clearance 343mm
Rear suspension WP XACT Monoshock with linkage
Seat height 958 mm
Steering head angle 63.9°
Suspension travel (front) 310mm
Suspension travel (rear) 300mm
Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).
