The BAC4000 upgrade kit is a complete ASI BAC4000 sinusoidal motor controller package built for the Talaria Sting electric dirt bike. It replaces the original Talaria Sting motor controller entirely. The kit includes the controller, a purpose-built wiring harness, an optional display, controller brackets and a controller heat sink.
Installation is plug-and-play. Because the harness connects straight to the factory Talaria Sting connectors, there is no soldering involved. You also avoid any frame modification or rewiring. The controller runs on 60 V and 72 V battery systems, including the stock factory pack.
Every buyer receives a personal remote programming session with our engineer. During that session the controller is tuned to your riding style. The engineer also checks the installation you have completed before you ride.
Benefits and Advantages
- Up to 15,000 W of power – roughly three times the output of the factory Talaria Sting controller.
- Four power configurations – 5,000 W, 8,000 W, 12,000 W or 15,000 W, depending on the battery you run.
- Reverse gear – the red button on the original Talaria throttle grip is reprogrammed to engage reverse.
- Individual tuning – the controller is programmed personally instead of being shipped on generic factory settings.
- Motor temperature protection – the system watches motor temperature and reduces power before overheating occurs.
- Battery depletion protection – output is lowered automatically once the pack charge runs low.
- No-modification wiring harness – the custom harness plugs directly into the Talaria Sting factory connectors.
- Power adjustment on the display – change the power level and assist percentage straight from the handlebar.
Who Is This For?
The kit is made specifically for the Talaria Sting electric dirt bike. It works with the factory 60 V battery and with a BMS bypassed factory battery. In addition, it suits separately purchased 60 V or 72 V high-current packs.
This product is aimed at riders who spend their time on off-road tracks and forest trails. It is particularly useful for anyone who finds the stock torque and speed limiting. The extra torque is felt at the rear wheel immediately.
Top speed also rises noticeably, depending on your rear sprocket choice. Reverse gear helps on narrow trails and in awkward situations, so you no longer have to push the bike by hand. This is an off-road part, therefore a bike fitted with it is not street legal.
What’s in the Box?
- ASI BAC4000 motor controller
- Display – 750C or Eggrider V2 (optional)
- Custom wiring harness for the Talaria Sting
- Controller brackets
- Controller heat sink
- Remote programming session with an engineer
Technical Specifications
| Controller | ASI BAC4000, sinusoidal (FOC) |
| Compatible bike | Talaria Sting |
| Battery voltage | 60 V – 72 V |
| Option 1: 60 V stock | 5,000 W |
| Option 2: 60 V bypassed | 8,000 W |
| Option 3: 60 V custom | 12,000 W (12 kW) |
| Option 4: 72 V custom | 15,000 W (15 kW) |
| Power gain (bypassed battery) | 75-90 % |
| Power gain (60 V / 72 V battery) | 180-300 % |
| Displays | 750C or Eggrider V2 |
| Reverse | Red button on the original throttle grip |
| Protections | Motor temperature protection, battery depletion protection |
| Display adjustment | Power, assist level %, wheel size, speed units (km/h – mph) |
| Installation | Plug-and-play, no soldering |
| Included | Controller, display, wiring harness, brackets, heat sink |
Why Choose the BAC4000 Upgrade Kit?
Many controller kits arrive with pre-loaded settings that never change. This one is tuned personally during a remote programming session. As a result, the power curve is matched to your terrain and your riding style.
Wheel size and speed units are set on the display as well, so the readout matches your actual setup. The engineer also reviews your installation during the same session. That check happens before you put load through the new controller.
The hardware side is equally considered. Brackets and a dedicated heat sink come in the box, so the controller mounts securely and stays cool under sustained load.
Frequently Asked Questions
Will this kit fit my Talaria Sting?
- The kit is built specifically for the Talaria Sting electric dirt bike.
- The custom harness plugs into the factory Talaria Sting connectors.
- It replaces the original Talaria Sting motor controller.
Do I need to solder or modify the wiring?
- No. Installation is plug-and-play.
- There is no soldering, frame modification or rewiring required.
Does it work with the stock Talaria Sting battery?
- Yes, the factory 60 V pack gives 5,000 W.
- A BMS bypassed factory pack gives 8,000 W.
- Custom 60 V and 72 V packs give 12,000 W and 15,000 W.
Which display should I choose?
- You can select the 750C or the Eggrider V2.
- Both let you set power, assist level, wheel size and speed units.
How does reverse gear work?
- The red button on the original throttle grip is reprogrammed.
- It is useful on narrow trails instead of pushing the bike.
What does the programming session include?
- A remote session with our engineer, one-to-one.
- The controller is tuned to your riding style.
- Your installation is checked at the same time.
Is the bike still street legal?
- No. This is an off-road part only.
With four power levels, individual remote tuning and a harness that connects to the factory plugs, the BAC4000 kit turns the Talaria Sting into a considerably faster trail bike. Motor temperature and battery depletion protection stay active at every power setting.
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