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KTM 300 SX 2025 is a 2-stroke motocross designed for performance in extreme offroad conditions. Maximum power at the lowest possible weight, enhanced by low maintenance costs and a smooth, linear delivery. The KTM 300 SX model is born to highlight the potential of riders who compete in the MX Open category. Despite the light weight, the equipped engine is capable of providing over 57 HP, turning the agile 300 SX motorcycle into an important benchmark when it comes to the ratio between power and weight.
The 2025 KTM SX series enjoys a suspension setup that completely eliminates the use of tools. Thanks to the optimized design of the manually adjustable damper for unparalleled control, riders have the ability to adjust the settings at high and low speeds in seconds. At the front end, the forks are easy to adjust thanks to a single air preload valve, as well as with easy-to-access adjustment clickers. The air pump comes standard. The KTM SX 2-stroke lineup benefits from electronic injection. Keihin EFI system and valve housing design guarantee optimal power at any altitude and at any time.
Electric start. Imagine that you are 7 laps into an absolute race, but miss the line and end up stuck in a deep ditch. All you have to do is press the start button for the vehicle to explode again to capture the final flag. This is a reality in the saddle of the 2025 KTM 300 SX. Under the pilot's seat you will find a 12.8V 2 Ah Lithium-Ion battery.
Smooth power delivery: EFI + power valve. The electronic injection determines great handling. The new power valve allows for more usable power throughout the rev range. A direct consequence of smooth power is better traction. Being the first driver to pass the top of the first turn is no small feat, so get ready for the holeshot!
Unmatched performance. The new 300 cc 2-stroke unit is becoming a formidable weapon in the MX Open category and offers opportunities to racers who want to obtain extreme power in the seat of a vehicle of the lowest possible weight. Maintenance costs, 57 horsepower and the engine's weight of only 23.9 kg contribute to pure performance.
Selectable maps. The 2025 KTM 300 SX features a map switch, allowing the rider to opt for one of two engine maps. Map 1 provides a linear and predictable power delivery, while Map 2 facilitates explosive power.
Precise control. Regardless of how difficult the route is, the rider benefits from complete control thanks to the optimized design of the frame, thought for longitudinal rigidity and which repositions the rotating mass closer to the center of gravity. The new shock mount provides improved anti-skid behavior to generate superior cornering traction, while the position of the footpeg support has been moved inwards for reduced risk in the event of jumps and when crossing deep ditches.
Ergonomics. The 2025 KTM SX and SX-F ranges include an improved triangle specially designed to ensure better contact with the knee, especially when sitting on steps, with more grippy surrounding surfaces. The plastic components contribute to the removal of mud in wet and slippery conditions, and the saddle cover with high grip and the saddle with a flatter profile offer exceptional control and freedom of movement. The aluminum subframe reinforced with polyamide improves the feedback to the rider.
With a major focus on mass centralization, the 2025 KTM 300 SX's engine is designed to centralize the rotating mass for optimal operation with the chassis. This results in a more nimble handling feel.
Along with the benefits of mass centralization and overall reduced weight, the anti-squat behavior of the chassis is significantly improved by changing the driving force of the steel frame concept. In layman's terms, the 2025 KTM 300 SX transfers power to the ground perfectly when escaping corners.
Rock solid front end - WP XACT fork. The 48mm front fork favors a confident approach to the circuit, even when it comes to extraordinary jumps. The fork protection rings have an optimized design to increase protection against dirt and to guarantee increased reliability.
Stability is another asset of the 2-stroke MX model. The 2025 KTM 300 SX is a rock solid dirt bike at any speed thanks to the aluminum CNC triple clamps. The fork clamps have precise geometry and ensure smooth action for unparalleled stability when aiming for the podium.
Technical characteristics:
- engine 1 cylinder, 2 strokes, 293.2 cm³
- electric start
- 5-speed gearbox
- front suspension WP XACT-USD, Ø 48 mm, travel 310 mm
- rear suspension WP XACT Monoshock with linkage, travel 300 mm
- front disc brake, 260 mm
- rear disc brake, 220 mm
- chain transmission
- Brembo hydraulic clutch
- tank 7.2 liters
- height of 958 mm
- ground clearance 359 mm
