Aprilia has introduced a new aerodynamic device on its MotoGP bike that is inspired by technology from Formula 1. The system is known as an “F-duct”, a concept first made famous by the McLaren Formula 1 team during the 2010 season. The idea behind it is simple: it changes the way air flows over the vehicle in order to increase top speed on long straights.

In modern MotoGP, aerodynamics have become extremely important. Teams now use wings, ducts and special bodywork to control how air moves around the bike. These features can create downforce, which helps the motorcycle stay stable in corners and during braking. However, strong aerodynamic parts can also create extra drag, which reduces top speed on straights.

Aprilia’s MotoGP bike, the Aprilia RS‑GP, already uses a very aggressive fairing design that produces good cornering performance. The shape of the side fairings works in a similar way to a diffuser in car racing, helping the bike grip the track when turning. The problem is that this design can slow the bike down slightly on long straights because it increases aerodynamic resistance.

To solve this issue, Aprilia engineers created a new airflow system inside the fairing. At the front of the bike there are small ventilation slots placed on both sides of the air intake. These slots allow air to enter channels inside the bodywork. The air then travels through the fairing and exits through two small openings on the upper part of the side panels. These exit holes are located near the rider’s forearms.

The clever part of the system is how the rider interacts with it. When the rider tucks in on the straight to reduce drag, their forearms naturally cover the openings on the side of the fairing. By blocking these outlets, the rider changes how the air flows through the bike. This effect separates the airflow along the fairing and reduces drag, allowing the motorcycle to reach a higher top speed.

The idea is similar to the original F-duct used in Formula 1. On the 2010 McLaren car, air travelled through a channel inside the chassis and reached the rear wing. When the driver covered a small hole with their hand, the airflow changed and caused the rear wing to “stall”. This reduced drag and could increase the car’s top speed by as much as 10 km/h on long straights.

Aprilia’s system works differently in detail, but the principle is the same: using airflow to temporarily reduce aerodynamic drag when the rider is on the straight. Importantly, the device does not use any moving mechanical parts. Instead, it relies on the rider’s natural riding position to control the airflow. Because of this, the design still follows MotoGP’s rules, which ban adjustable aerodynamic devices.

Early signs suggest that the concept could be effective. During the MotoGP race weekend at the Chang International Circuit, Aprilia bikes were among the fastest machines in the speed traps. Both Aprilia and Ducati reached around 345 km/h on the straight.

One of Aprilia’s riders, Jorge Martin, said that the effect is noticeable but not dramatic. He explained that he can feel a bit more airflow on the straights, although from the rider’s 

perspective the difference is not huge. Still, even small improvements in speed can make a big difference in MotoGP racing.

The system may also show how MotoGP engineering is becoming more similar to Formula 1. Many teams are now experimenting with complex aerodynamic ideas that control airflow around the bike. If Aprilia’s solution proves successful, other manufacturers may try to copy the concept in the future.

In the end, the F-duct on the Aprilia bike shows how engineers continue to search for small advantages. By carefully managing airflow and using the rider’s body as part of the aerodynamic system, the team has found a creative way to gain extra speed without breaking the rules.