2025 Red Bull Day in the Dirt | Marvin Musquin’s 2025 KTM 350 SX-F

Presented by FXR Racing

You can ride any motorcycle you want when you’re a freshly retired former World and Supercross Champion like Marvin Musquin. Even though he hasn’t lined up for a professional Supercross or motocross for a couple of years now, Marv still rips up the tracks around Southern California regularly. The Frenchman just built up a fresh 2025 KTM 350 SX-F for this weekend’s Red Bull Day in the Dirt Motocross Grand Prix! Before he spun his first laps on the bike, we pulled it aside to snap a few photos, as it is stunning to look at. When we asked him who built it for him, he quickly replied, “ME!” Musquin says that while he loved the power of the KTM 450 SX-F, he chose the 350 SX-F because it is just so fun to ride. Everything on Musquin’s bike is available through the KTM Power Parts catalog, and bolts right on to the OEM machine. What do you think of Marv’s bike? What’s the coolest part and what would you do differently?