The 2026 Beta 350RX two-stroke is an all new model for the Italian brand, while the KTM 350SXF four-stroke has been a mainstay for KTM since 2011. Although these bikes couldn’t be more different from each other, we decided to put them head to head for a laptime battle.

Beta 350 RX vs KTM 350 SX-F – Which 350cc Motocross Machine Truly Rules the Track?

When it comes to high-performance 350cc motocross bikes, the Beta 350 RX and the KTM 350 SX-F represent two very different philosophies. One embraces the raw excitement of a big-bore two-stroke, while the other delivers the refined precision of a championship-winning four-stroke. Both are built to win—but they create completely different riding experiences.

Engine Character

The Beta 350 RX features a 352cc liquid-cooled two-stroke engine that delivers explosive acceleration, massive mid-range torque, and an aggressive power hit. It feels lively, lightweight, and incredibly fun, especially for riders who enjoy an adrenaline-filled riding style.

The KTM 350 SX-F, on the other hand, uses a 349.7cc fuel-injected four-stroke engine. Power delivery is smoother, more predictable, and easier to control across the entire RPM range. It combines the agility of a 250 with much of the power of a 450, making it one of the most versatile motocross bikes ever built.

Handling

The Beta offers a planted feel with KYB suspension that absorbs rough terrain exceptionally well. It shines on natural motocross tracks and technical sections where traction is critical.

The KTM feels lighter in motion and changes direction with incredible precision. Its WP XACT suspension and race-focused chassis provide excellent stability through jumps, corners, and high-speed sections, making it a favorite among competitive racers.

Maintenance

The Beta’s two-stroke design is mechanically simpler, making top-end maintenance easier and generally less expensive. Riders who enjoy working on their own bikes often appreciate this advantage. However, two-strokes typically require more frequent piston service.

The KTM’s four-stroke engine demands more complex maintenance, including valve inspections, but rewards owners with exceptional reliability and long-term race performance when properly serviced.

Who Should Choose the Beta 350 RX?

Choose the Beta 350 RX if you:

• Love the aggressive character of two-stroke engines.
• Want explosive acceleration and exciting power delivery.
• Prefer easier engine maintenance.
• Ride natural terrain, woods, or technical motocross tracks.
• Enjoy a unique motorcycle that stands out from the crowd.

Who Should Choose the KTM 350 SX-F?

Choose the KTM 350 SX-F if you:

• Race motocross competitively.
• Want smooth, predictable, and controllable power.
• Appreciate cutting-edge electronics and fuel injection.
• Prefer proven championship-level performance.
• Need a bike that performs consistently on every lap.

Final Verdict

The Beta 350 RX is all about emotion. It delivers a thrilling ride with explosive power, lightweight handling, and the unmistakable excitement that only a modern two-stroke can provide.

The KTM 350 SX-F is all about precision. It is faster, more refined, easier to race consistently, and remains one of the benchmark 350cc motocross bikes in the world.

If your heart wants excitement, choose the Beta 350 RX.

If your goal is podium finishes and maximum race performance, the KTM 350 SX-F is the ultimate weapon.