2025 KTM 450 SX-F
2024 KTM 350 SX-F for Sale at Ultimate KTM Ipswich in West Ipswich, QLD | Review Specifications, Features & Information
MIDDLE-GROUND MASTERCLASS
With over a decade of racing - and winning - at the highest tier of professional motocross, the KTM 350 SX-F has long shed its underdog label and proven itself a worthy adversary. Delivering usable power throughout the rev range, unwavering stability at speed, and true championship-winning credentials, the 2024 KTM 350 SX-F is once again READY TO RACE.
Suspension
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.
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.
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 safe 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.
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.
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.
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 peak power output, and an overall engine weight of only 26.8 kg, you'll leave the competition with more than a little mud on the face.
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.
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.
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.
Performance
The 2025 KTM 450 SX-F engine is tilted 2° backward, this means greatly improved mass centralization and reduced overall weight, benefiting handling and anti-squat behavior. A silencer offers an improved 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 setting gate with re-tuned settings, reduced weight, improved weight distribution, and an increase in overall response.
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.
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.
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.
ENGINE
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Transmission
5-speed
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Starter
Electric starter
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Stroke
57.5 mm
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Bore
88 mm
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Clutch
Wet multi-disc DS clutch, Brembo hydraulics
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Displacement
349.7 cm3
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EMS
Keihin EMS
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Design
1-cylinder, 4-stroke engine
CHASSIS
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Weight (Without Fuel)
101.9 kg
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Tank Capacity (Approx.)
7.2 l
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Front Brake Disic Diameter
260 mm
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Rear Brake Disic Diameter
220 mm
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Front brake
Disc brake
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Rear brake
Disc brake
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Chain
520, Non-sealed
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Frame Design
Central double-cradle-type 25CrMo4 steel
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Front Suspension
WP XACT-USD, Ø 48 mm
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Ground Clearance
359 mm
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Rear Suspension
WP XACT Monoshock with linkage
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Seat height
958 mm
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Steering head angle
63.9 °
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Suspension Travel (Front)
310 mm
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Suspension Travel (Rear)
300 mm
The illustrated vehicles may vary in selected details from the production models and some illustrations feature optional equipment available at additional cost. All information concerning the scope of supply, appearance, services, dimensions and weights is non-binding and specified with the proviso that errors, for instance in printing, setting and/or typing, may occur; such information is subject to change without notice. Please note that model specifications may vary from country to country.
The consumption values stated refer to the roadworthy series condition of the vehicles at the time of factory delivery.