Sur-Ron Ultra Bee MX 2026

The Sur-Ron Ultra Bee MX is the mid-range powerhouse built for serious riders who need full-size motorcycle ergonomics and power from an electric platform. With a 12.5kW permanent magnet synchronous mid-drive motor delivering instant torque through a chain-driven rear wheel, the Ultra Bee bridges the gap between the lightweight Light Bee and the full-size Storm Bee.

The 2026 Ultra Bee runs on 19-inch front and 19-inch rear spoked wheels with long-travel fully adjustable inverted suspension providing 240mm of travel up front and 250mm at the rear. The 74V/55Ah lithium battery pack delivers robust trail range and supports fast charging to 80% in under 2 hours. Traction control and regenerative braking come standard, with three rider modes (Eco, Daily, Sport) selectable via the handlebar-mounted display.

At 85kg (187 lbs), the Ultra Bee is significantly lighter than any internal combustion motorcycle in its performance class. The whisper-quiet motor means you can ride trails that ban combustion engines, opening up terrain that was previously off-limits. The mid-engine placement provides optimal 50/50 weight distribution for aggressive cornering confidence.

Powertrain Architecture & Electronics: The heart of the Ultra Bee MX is a high-efficiency 74V PMSM motor managed by Sur-Ron's proprietary FOC sine-wave controller. An advanced multi-axis inertial measurement unit (IMU) feeds real-time pitch and lean-angle data into the traction control system, preventing unexpected wheel slip on slippery hard-pack and wet roots.

Riding Dynamics & Ergonomics: With a 35.8-inch seat height and genuine motocross geometry, the Ultra Bee feels like a modern 125cc two-stroke with the immediate bottom-end roll-on torque of a 250cc four-stroke. The 250mm long-travel suspension soaks up braking bumps, whoops, and jump landings without harsh bottoming, while the mid-engine weight distribution allows effortless turn-in and predictable mid-corner drift control.

Setup, Maintenance & Safety Guidelines: Before your first ride, set the rear shock preload to achieve 25% to 30% rider sag. Inspect drive chain tension (maintain 20mm of vertical play) and torque rear axle nuts to 45 Nm. Always wear full motocross protective gear including a DOT/ECE helmet, off-road boots, and chest protector.

Key Companion Upgrades: For rocky enduro trails, install a heavy-duty underbody skid plate to protect the lower frame cradle and linkage, and equip sintered metallic brake pads for fade-free stopping power on long mountain descents.

Frequently Asked Questions:

Q: How does the Ultra Bee MX compare in size to the Light Bee X? A: The Ultra Bee is a substantially larger, true mid-size motorcycle weighing 85 kg with a 35.8-inch seat height and 19"/19" wheels, compared to the 52 kg Light Bee with its 32.6-inch seat height.

Q: Does the Ultra Bee feature a reverse gear? A: Yes. The Ultra Bee includes a handlebar-activated electronic reverse mode that makes maneuvering out of tight ruts or loading onto hitch racks effortless.

Q: What type of charger is included with the Ultra Bee? A: It includes a high-output smart charger that plugs into standard 110V/220V wall outlets, fully recharging the 74V/55Ah battery in approximately 4 to 4.5 hours.

Q: Can the Ultra Bee's traction control system be adjusted? A: Yes. The multi-level traction control system can be adjusted or turned off completely via the handlebar switchgear to suit track and trail conditions.