The 2026 Beta RR X-Pro 4-Stroke lineup has a hand-winning ace up its sleeve for California riders—they will be eligible for a Green Sticker, making them legal on government off-road trails. There are also a few other changes to the four-bike lineup—350, 390, 430, and 480—that will benefit riders in all 50 states, so let’s get to them.
- The engine mapping for the 2026 Beta RR X-Pro 4-strokes is new. Beta tells us the goal is “improved…linearity and usability, to better manage the power available, at any speed.”
- The Sachs SHC fork has been updated. There’s a new spring guide to improve oil flow. Also, pressure induced at high speeds has been reduced. According to Beta, the fork will be able to react more freely.
- The front brake caliper is new. It’s still a four-piston Nissin, but this is the caliper from the 450 RX that has been campaigned in the Monster Energy AMA Supercross and Pro Motocross championship series is smaller and lighter.
- The radiators have been upgraded. Beta tells us they’re more durable.
- The rear axle is now 22mm in diameter. That increase is designed to improve the stability of the RR X-Pro thumpers. It comes from the 450 RX motocrosser.
- A Unibat Lithium eXtra ULT1 B battery will power the electric starters on the 2026 Beta RR X-Pro 4-stroke lineup. It has a 32-watt-hour capacity and 150 cold cranking amps.
- There’s a new LED taillight on the RR X-Pro models. This is another durability improvement.
- Red is back for 2026. In addition to new graphics, there is a lot of red plastic.
- We don’t have prices for the 2026 Beta RR X-Pro four-strokes. We can confirm that they will be available in September in 49 states, with the California-legal versions arriving a month later.
2026 Beta 480 RR (430 RR, 390 RR, and 350 RR) X-Pro Specs
ENGINE
- Type: Single-cylinder 4-stroke
- Displacement: 478cc (430: 431cc; 390: 386cc; 350: 349cc)
- Bore x stroke: 100 x 60.8mm (430: 95 x 60.8mm; 390: 88 x 63.4mm; 350: 88 x 57.4mm)
- Compression ratio: 11.9:1 (430: 12:3:1; 390: 12.5:1; 350: 13.2:1)
- Valvetrain: DOHC; 4 titanium valves
- Fueling: 42mm throttle body /w dual injectors
- Ignition: Dual-map Kokusan w/ tr action control
- Starting: Electric
- Lubrication: Twin oil pumps; engine and transmission oil separate
- Transmission: 6-speed
- Clutch: Wet diaphragm-style
- Final drive: O-ring chain
CHASSIS
- Frame: Double-cradle chromoly steel
- Front suspension; travel: Fully adjustable Sachs SHC inverted 48mm fork; 11.1 inches
- Rear suspension; travel: Linkage-assisted, fully adjustable Sachs piggyback-reservoir shock; 11 inches
- Rims: Excel Takasago
- Tires: Maxxis Enduro
- Front tire: 90/90 x 21
- Rear tire: 140/80 x 18
- Front brake: 260mm disc w/ 4-piston Nissin caliper
- Rear brake: 240mm disc w/ 2-piston Nissin caliper
DIMENSIONS and CAPACITIES
- Wheelbase: 58.3 inches (350: 58.1 inches)
- Seat height: 36.6 inches
- Ground clearance: 12.4 inches
- Fuel tank capacity: 2.4 gallons
- Curb weight: 253 pounds (390 and 350: 251 pounds)
2026 Beta RR X-Pro 4-Strokes Prices: MSRP $TBA
2026 Beta RR X-Pro 4-Stroke Lineup Photo Gallery
