BMS Performance "Unlocker" Kit (29kW) / Sur-Ron Ultra Bee 2023 - 2024

This is the first essential step for any Ultra Bee owner. This software and electronic optimization kit finally allows you to use 100% of the capabilities of your original battery.

By removing manufacturer restrictions, you radically transform your motorcycle's behavior without changing the motor or the main battery.

WARNING, this BMS is compatible with the original controller, but the battery level display is no longer visible; you will need to use the mobile application to access it. INCOMPATIBLE WITH ULTRA BEE 2025 and beyond.

• Massive Power Gain: Up to +130% power (from 12.5kW to 29kW peak).
• Range Gain (+25%): By lowering the cut-off threshold, we unleash the battery's "dormant" energy.
• Respect for Manufacturer Data: Rest assured, lowering the threshold to 3.0V remains strictly within the recommended usage range by the cell manufacturer. Sur-Ron uses an excessive safety margin (3.5V) which we optimize without endangering your battery's chemistry.
• Total Responsiveness: Instant motor response and available torque across the entire voltage range.

Based on your usual range with the original configuration:

Don't feel comfortable installing the BMS yourself? Choose the "Installation by our team" option from the dropdown menu.

• How it works? After ordering, you send us your battery (shipping costs at your expense). Our technicians install the BMS, calibrate the system, and send you the battery back, ready to ride (return shipping costs included).

Installing this kit requires a bit of method. To guide you step by step and ensure a safe assembly, we have prepared a detailed manual as well as a demonstration video.