ASI 8000 Controller 14000w Sur Ron Moto X Race 72v Version with: Loom and Voltmeter (no display)

£899.00 £879.00

Moto X Race 72V Version ASI BAC 8000 Controller For Sur Ron with: Loom and Voltmeter

Out of stock


Moto X Race 72V Version ASI BAC 8000 Controller For Sur Ron with: Loom and Voltmeter

Higher Volts, Higher Amps Higher RPM+  Higher Speed !

This is truly plug n play and expect RELIABLE speeds of around  75- 85+ MPH (with upgraded battery)
All taxes and import duties paid and UK shipping

We wanted to bring a slightly cheaper but more robust version of the controller with no stupid gadgets and updates. This version simply bolts to the bike and uses the existing throttle. Add the handlebar ebike built volt meter, to tell you your battery state and your ready to go. Expect a shock as the 14000 watts kicks in!!!

We figure when you buy a motocross bike, you don’t sit there looking at a speedo, most don’t even have a rev counter (why do you need this on an electric bike?) You dont turn your power down just because your running out of fuel on a gas bike, you just go gentle on the throttle – same here! If you want to know your speed then stick a bicycle GPS on the handle bar and strap your smart phone to it (let your mum and  little sister call you too), but when you want to hit the rough,, with nothing to break and no updates or silly flashing colour screens, take the phone away and your ready to go!!

This set up can damage your motor if used non stop wide open throttle. Ride the bike like a gas Mot X: full open throttle on the straights, brake and the blast out of the burns. This is not designed to go on the road and pin the throttle in the red along a long road. Keeping the motor in the red isn’t going to do anybody any good. This is a balls out race set up. Every time you come of the throttle your motor, battery and controller have a chance to cool enough (the controller wil not overheat nor our 72v battery – both would just shut down if you caned them too much).

I ride my bike like this and I’m 20 stone, I still have to lean forward to stop the wheel coming up, Put the 56T on it and its wheel spinning flip city!!

Set at the same power as its slightly smaller brother the 4000, but it doesn’t choke the power back because of heat . This controller is designed for much higher power outputs than the 4000. The 8000 here finds these power setting extremely easy to handle and with much better cooling. The 8000 is able to convert more DC amps to phase amps than any other ASI controller. We make the same profit by selling either controller, but just cant see the point of the slower 4000 on this race set up, but in our opinion the sheer superiority of the 8000 makes buying the 4000 crazy except for a small saving. Weight 2.3KG

Power sets from

14000w with upgrade after market 72v battery (if your worried about reliability, we can turn this down before shipping on request. A smaller 13500 watts is often requested)


Controller Feature Set

  • FOC (Field Oriented Control)
  • improved torque throughout the rev range
  • Higher RPM compared to the stock controller on 52V and especially on 72V
  • Silky smooth throttle control and responsiveness.
  • Improved efficiency due to FOC algorithm, premium internal components within the controller (like the mosfets) which increases efficiency while reducing heat losses
  • Automatic sensored to sensorless transition which gives you addition 5% top speed and better performance
  • Usable voltage is 72V
  • Loom
  • Mounting Kit
  • Install Instructions
  • Volt meter


we recently after a long relationship broke away from a well known Californian business who supplied us these controllers. We found the latest display supplied by them was simply to difficult for most users with features that caused too many issues.

Now: no updates, no messing and no home made display cases.

Unfortunately this set up will not allow the simple swapping of battery voltages. You have to choose your battery voltage and stick with it. We will however change this voltage for you free one time only by appointment via remote session on your laptop with a Bafang programming lead. So if you buy the controller to run on a 72v battery and then for whatever reason go back to the 60V Sur Ron power battery, the motor will still work


The handlebar voltmeter will show full at 84v , half way at 72v and motor stop at 60v. So at 65v under load start nursing the throttle. Remember its the displayed voltage when your under power, is the voltage that  counts, not sitting in the paddock or down the pub

Sorry but we will not be supplying any Bluetooth codes.

Self Fitting:

This is a plug and play system, but we now believe there are at least three slightly different version of the Sur Ron Lightbee motor. This can cause some minor issues. Because of this we now include 1 hour free remote support during our working hours (9 – 5.30 Mon-Friday and Saturday morning by appointment). We strongly advise that you factor in our working hours when fitting. We will not give support outside these hours. To give remote support you will need either an iPad or iPhone and good internet connection.

We now offer a fitting service:

Prior appointment only

Different location around the county.

Does not include bike, or parts.

Bike must be dropped off in good working order and clean!

Additional repairs will be charged at £35 per hour – this is not a repair service!

Current fitting locations are:

North Devon (Barnstaple – Electroncycles)

North Wales (Baglit – Missel E-bikes)

North Leads (Otley – Fitter)

Telford (fitter)

Liverpool (Hyton – PowerEbikes)


* UK Warranty 



Price £229 and not included with the original controller purchase ((just click on the picture/link): .

ASI Controller Sur Ron Fitting Service

We reserve the right to slightly modify or change this product without notice.


Buyer releases Electron Cycles or any person trading on or behalf of the business known as Electron Cycles from any liabilities, therein known as Electron Cycles (expressed or implied, arising by law or otherwise) that may occur from the use of products sold by Electron Cycles and purchased by Buyer. These products are being sold for “Off Road/Competition Use” only and may be used only on two wheel vehicles (bicycles, electric bicycles, two wheel electric powered vehicles) used solely for “Off Road/Competition” (off-road being defined as a private land with land owners permission and not public highway or byway). The Buyer also recognises that Lithium batteries are classed as hazardous and should not be: stored, used, charged in place, facility any area that is not fire proof or safe to do so. That batteries should not be taken into the family home, office, workplace or school place. No other applications are intended or implied. The Buyer of product sold or provided by Electron Cycles acknowledges and agrees that Seller disclaims any warranty and expressly disclaims any liability for personal injury or damages or any damages to vehicle, expensed occurred, personal property or third persons. Electron Cycles will uphold the warranty of the manufacture of the product sold for a minimum of six months from date of purchase from manufacturer defect. In the event a manufacturer’s warranty exists, it is agreed and stated that Under no circumstances shall the seller or manufacture be liable for any labour charged or travel time incurred in diagnosis for defects, removal, or reinstallation of this product, or any contingent expenses.






Additional information

Weight 3.2 kg
Dimensions 40 × 25 × 25 cm