BAC4000 / BAC8000 Controller Heatsink with Mount – Sur-Ron & Talaria

This aluminium heatsink with integrated mounting bracket is a cooling part built for ASI BAC4000 and ASI BAC8000 motor controllers fitted to Sur-Ron and Talaria electric dirt bikes. It bolts directly onto the controller housing and pulls heat away from it. Side covers are included in the set, so the controller sides stay shielded from water, dirt and impacts.

BAC4000 and BAC8000 units are powerful FOC-type motor controllers. During hard riding they run hot, and heat is what drags performance down. Rising temperature also shortens controller service life. This heatsink increases the heat-radiating surface area and keeps the working temperature lower.

Note that this is a tuning and modification part, not the controller itself. It adds no power. Instead, it lets a BAC4000 or BAC8000 you already own run more consistently. Installation is straightforward, so most riders fit it themselves.

Key Benefits

• Lower controller temperature – the aluminium fins dissipate BAC4000 and BAC8000 heat while you ride.
• Overheating protection – a steadier working temperature reduces the risk of power drop-off.
• Side covers included – they close off the controller flanks and add a second layer of defence.
• Water and dirt shielding – the controller housing stays cleaner on muddy and wet trails.
• Wiring harness protection – the structure guards the loom running into the controller.
• Impact resistance – the solid build absorbs knocks and takes hits instead of the controller.
• Longer service life – running cooler extends how long the controller keeps working properly.
• Two parts in one – the bracket mounts the controller and cools it at the same time.
• Simple fitment – it attaches to the controller housing without cutting or reworking anything.

Who Is This For?

This heatsink and bracket set suits Sur-Ron and Talaria electric dirt bikes running an ASI BAC4000 or ASI BAC8000 controller. Confirmed fitment covers Sur-Ron Light Bee and Sur-Ron Light Bee X. It also fits Talaria Sting, Talaria Sting R and Talaria XXX.

Above all, it is aimed at riders who have already upgraded to a BAC4000 or BAC8000. Those controllers pull high current, which makes proper cooling a necessity rather than an option. Furthermore, it earns its place on long runs, during hill work and in high ambient temperatures.

The set is equally relevant for anyone riding forest tracks, mud or damp trails. Because the side covers and bracket structure block environmental exposure, the controller stays cleaner and far less vulnerable to damage.

What’s in the Box?

• Cooling heatsink with mounting bracket for BAC4000 / BAC8000 controllers.
• Side covers for controller protection.

Technical Specifications

Why Choose This Heatsink?

As standard, BAC4000 and BAC8000 controllers mount to the frame with no dedicated cooling solution at all. This bracket answers both problems at once: it holds the controller and cools it. Consequently, there is no need to source a mount and a cooler separately.

Aluminium was chosen for its thermal conductivity. Side covers are supplied instead of the open mounting style that leaves controller flanks exposed. As a result, the unit copes far better with mud, loose stones and water spray.

The structure also shields the wiring harness, which is the most common damage point underneath the controller. Together, these details create better operating conditions for the controller and keep environmental factors away from it.

Frequently Asked Questions

Does this heatsink fit a Sur-Ron Light Bee X?

• Yes. Fitment covers Sur-Ron Light Bee and Light Bee X.
• The bike must be running an ASI BAC4000 or BAC8000 controller.

Will it fit a Talaria Sting or Talaria XXX?

• Yes. Talaria Sting, Sting R and Talaria XXX are all covered.
• Again, the fitment depends on the BAC4000 or BAC8000 controller being installed.

Is the controller included?

• No. This is a cooling and mounting part only.
• You supply your own ASI BAC4000 or BAC8000 unit.

Will it increase my power output?

• No. It adds no power on its own.
• However, lower temperatures help the controller hold performance instead of dropping off.

Does it need a fan or any wiring?

• No. Cooling is fully passive.
• Nothing needs to be powered or connected electrically.

What material is it made from?

• Aluminium, selected for its heat conductivity.
• The build is solid enough to absorb mechanical impacts.

How difficult is the installation?

• Straightforward – it bolts to the controller housing.
• No cutting, drilling or frame modification is required.

What do the side covers actually do?

• They close off the exposed sides of the controller.
• Additionally, they help keep water, dirt and stones away from the housing and harness.

Heat is the main limiting factor for a hard-working FOC controller. This aluminium heatsink, bracket and side cover set tackles temperature, mounting and physical protection in a single package. For any Sur-Ron or Talaria running a BAC4000 or BAC8000, it is a practical step toward more stable rides and a longer-lasting controller.