The ASI BAC8000 power upgrade kit is a programmable motor controller package built for the Sur-Ron Light Bee electric dirt bike. It replaces the original Sur-Ron controller entirely. Inside the box you get the ASI BAC8000 controller, a display (750C or Eggrider V2), controller mounting brackets and the connecting wiring.
With the stock Sur-Ron motor still in place, output is adjustable from 5,000 W up to 18,500 W. The motor and battery stay yours, because neither is included in the kit. In other words, the entire power jump comes from swapping the electronics alone.
Factory Sur-Ron output sits at 4.8 kW. With an upgraded motor, this kit can deliver up to 32 kW — more than 6.6 times the stock figure. Furthermore, every kit is programmed individually to match your specific bike configuration.
Key Benefits
- Individual tuning – an engineer prepares the controller program for your machine, rather than loading a generic preset profile.
- Adjustable output to 18.5 kW – a several-fold power increase is reached even with the stock Sur-Ron motor.
- 60 V and 72 V compatibility – works with the original battery and with upgraded 60 V or 72 V packs.
- Plug-and-play fitment – installation needs no soldering and no frame modifications.
- Power changes through the display – the rider adjusts delivered output straight from the control screen.
- Motor overheat protection – the system watches motor temperature and reduces power when needed.
- Battery preservation mode – output drops automatically once the charge level falls.
- Wheel size setting – speed readings become more accurate, and units switch between km/h and mph.
Who Is This Kit For?
This kit suits Sur-Ron Light Bee electric dirt bikes running either the stock motor or a stronger aftermarket motor. It fits bikes on the original OEM battery as well as those on 60 V or 72 V high-current packs.
Above all, riders choose it when the factory 4.8 kW simply is not enough off-road. Extra torque is felt at the rear wheel, while acceleration becomes noticeably sharper. Top speed rises too, though the exact figure depends on your rear sprocket. Because output climbs several times beyond e-bike limits, an upgraded bike belongs off-road or on a closed track.
What Is in the Box?
- ASI BAC8000 motor controller
- Control display – 750C or Eggrider V2 (your choice)
- Controller mounting brackets
- Connecting wiring
- Controller heatsink – available as a separate add-on
Technical Specifications
| Controller | ASI BAC8000 |
| Compatible machine | Sur-Ron Light Bee |
| Operating voltage | 60 V – 72 V |
| Power: 60 V stock battery | 5,000 W |
| Power: 60 V with bypassed BMS | 7,200 W |
| Power: 60 V custom program | 15,000 W (15 kW) |
| Power: 72 V custom program | 18,500 W (18.5 kW) |
| Maximum power with upgraded motor | up to 32 kW |
| Factory Sur-Ron output | 4.8 kW |
| Displays | 750C, Eggrider V2 |
| Installation | Plug-and-play, no soldering or modifications |
| Protections | Motor overheat protection, power reduction at low battery charge |
| Display adjustments | Power, assist level in percent, wheel size, speed units (km/h – mph) |
| Battery type | OEM, upgraded 60 V or 72 V |
Why Choose the ASI BAC8000 Kit?
Many kits ship with a fixed factory program. Here an engineer prepares the controller parameters around your exact configuration. As a result, power is matched to what your battery can actually supply, not the other way round.
Secondly, four power tiers let you grow in stages. You can begin at 5,000 W on the original battery. Later, after moving to a 72 V pack, the same electronics will deliver 18,500 W. Installation demands no rework either: the original controller comes out, and the BAC8000 goes in.
Frequently Asked Questions
Will this kit fit my Sur-Ron Light Bee?
- Yes, the kit is built specifically for the Sur-Ron Light Bee electric dirt bike.
- It works with the stock motor and with a stronger replacement motor.
Does the kit include a motor or a battery?
- No. The motor and battery remain yours.
- The kit contains the controller, display, brackets and wiring only.
How much power can I get with the stock Sur-Ron motor?
- Output is adjustable from 5,000 W to 18,500 W.
- The 60 V stock battery gives 5,000 W; a bypassed BMS gives 7,200 W.
Which battery voltages are supported?
- The controller operates on 60 V and 72 V.
- OEM packs and upgraded 60 V or 72 V high-current packs both work.
Is soldering needed to install it on a Sur-Ron Light Bee?
- No. The kit connects directly in place of the original controller.
- No soldering and no frame modifications are required.
What can I change from the display?
- Power output, assist level in percent and wheel size.
- Speed units also switch between km/h and mph.
Which display comes with the kit?
- You choose either the 750C or the Eggrider V2.
Is a heatsink included?
- No, the controller heatsink is ordered separately as an add-on.
Each ASI BAC8000 kit is programmed to your own Sur-Ron Light Bee setup, so the four power tiers can be used step by step as your battery and motor evolve. Given output that climbs to 18.5 kW on the stock motor and 32 kW on an upgraded one, the modified bike is intended for off-road riding or closed-course use.
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