Each factory invests in testing, engine mapping, and suspension support that can swing lap times by tenths. Here is how the 2025 squads line up.
Riders: Cooper Webb, Aaron Plessinger.
Focus: Refined chassis flex and new shock valving for better whoop drive.
Riders: Eli Tomac, Haiden Deegan.
Focus: Strong engines with a reputation for holeshots; lighter swingarm to calm rear-end chatter.
Riders: Chase Sexton, Jett Lawrence.
Focus: Corner speed and updated ECU maps that smooth throttle response exiting slick bowls.
Riders: Jason Anderson, Adam Cianciarulo.
Focus: Engine braking adjustments to keep the KX planted on rutted downhills.
Riders: Justin Barcia, Pierce Brown.
Focus: Aggressive chassis feel; aims to convert Barcia’s strong starts into main-event calmness.
Riders: Ken Roczen.
Focus: Stability-first setup with tried-and-true components; betting on starts and consistency.