KTM is currently the dominant player in the dirt bike industry. They offer more off-road models than all the Japanese brands combined. The 2024 450SX-F is the flagship model among their extensive lineup. It has been driving technological advancements in its class for the past decade. Although it remains unchanged for 2024, it has undergone a major makeover in the previous year. Let’s see how it performs.
RISKS AND REWARDS
When the new-for-2023 KTM 450SX-F was introduced, it received a mix of praise and concern. The frame had been completely redesigned with different flex characteristics and a lower output shaft to improve anti-squat behavior. The motor featured significant changes in the head and throttle body. A new map switch on the handlebar allowed riders to choose between aggressive and mild maps, as well as access traction control and Quickshift. The shock was also redesigned, while the fork remained the same with new valving. However, the bike’s weight increased by around 6 pounds.
There were concerns among riders who were loyal to the previous version of the bike. They felt that the new frame was stiffer, possibly favoring Supercross-style riding. When it was revealed that even Cooper Webb struggled with the new machine, complaints escalated. Nevertheless, the 2023 version is now said to be unchanged, apart from graphics. Riders have had to adjust their riding style and expectations for the bike.
GETTING REACQUAINTED
It’s important to note that the KTM 450SX-F is a highly powerful motorcycle. In the 2023 450 shootout, it recorded the highest horsepower on the dyno at 59.94 horsepower, followed closely by the Husqvarna FC450 and Yamaha YZ450F. What sets the KTM apart is not just its peak output, but also its smooth and controllable power delivery. The power buildup is linear, with an early peak. While it doesn’t require high revs, it demands respect. The 450SX-F has great low-end torque, allowing riders to short-shift and avoid pushing the bike too hard. However, it requires a cautious approach to avoid stalling out, especially during hard braking or sudden throttle openings at low RPMs. Overall, the bike requires a precise right wrist.
KTM provides two map options, which can be selected on the handlebar. The white map offers smoother power delivery, while the green map allows for freer revving. The difference in peak horsepower between the maps is minimal. The bike also offers traction control, although opinions on its usefulness vary among riders. The Quickshift feature, which momentarily interrupts the ignition during shifts, can be very effective if used correctly. However, it is not frequently utilized in real-world riding conditions. Launch assist, which reduces output for better traction during starts and automatically deactivates after shifting to third gear or when the throttle is chopped, proves to be more useful for most riders.
ABOUT THAT CHASSIS…
Initial feedback on the new chassis was mixed when it was introduced a year ago. Many riders found it stiffer than the previous version, and it took time for them to adapt and unlock its potential. The 2023 GasGas MC450F, which retained the old frame, was seen as more flexible in comparison. However, over time, riders discovered that the new chassis offered improved performance. The 2024 model retains the same characteristics, excelling in cornering. It is easy to initiate turns and maintains a level attitude throughout. Despite being slightly heavier than the previous model, it remains lighter than its 450 class competitors. Notably, the KTM still uses the WP Xact air fork, which offers adjustability and light weight but may not provide the same level of comfort as other forks on the market. Feedback can be felt through the handlebars when encountering rough bumps. The choice to use air forks remains controversial, with some riders preferring traditional coil springs for stability. KTM’s XC cross-country models now come with coil-spring versions of the Xact fork, which have received positive reviews for off-road riding. This development raises curiosity about how they would perform in motocross settings.
Riders may initially find the rear suspension slightly rigid, but it improves over time as the frame settles in. The compliance issues associated with the frame’s stiffness gradually disappear after approximately 10 hours of riding. Once settled, the overall performance surpasses that of the previous version. The stock settings for sag are suitable for riders in the 170-pound range, with most riders preferring about 105mm.
THE AUSTRIAN CONNECTION
KTM is renowned for its use of high-quality suppliers, many of which are owned by KTM’s parent company. This includes WP for suspension and radiators, Pankl for engine internals, and other companies like Brembo, Neken, Dunlop, Twin Air, and Galfer. Their contributions ensure the overall quality of the bike but also come at a higher price tag. The 2024 KTM 450SX-F is priced at $11,099, reflecting KTM’s reputation as a leading brand.
Despite no changes for the year, the 450SX-F continues to gain prominence in the motocross market. Overall, it is clear that more riders are turning to KTM. These developments indicate positive changes for the brand as it continues to dominate the industry.