Sur Ron Ultimate 21Kw (Burst), EBMX X9000 V2 + Dominator V3, 72v 55Ah + Sotion Motor

Original price was: £4,618.00.Current price is: £4,549.00. (price including VAT)

Sur Ron Ultimate 21Kw (Burst), EBMX X9000 V2 + Dominator V3, 72v 55Ah + Sotion Motor

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Sur Ron Ultimate 21Kw (Burst), EBMX X9000 V2 + Dominator V3, 72v 55Ah + Sotion Motor

Controller + Display + 72v Battery 55Ah + Sotion Motor  

Higher Volts, Higher Amps Higher RPM+  Higher Speed !

This is truly plug n play and expect RELIABLE speeds of around  75-80Mph
All taxes and import duties paid and free UK shipping

Street (3 modes) Race (3 modes) power levels fully tunable by you. 

Charger Included !!

 Fully Supported

Shipping: UK next day (free).
EU land ship available

Due to the amount of money involved BANK TRANSFER OR CASH ONLY – please email or call .


Power is real 16kW (not the over stated ratings others use with 64T sprockets that never pull the full power). Our CEO is 295 lbs in weigh/21 Stone/135KG. He rides with a very low 58T and still hits 75 mph. Our test rider at 12 stone, riding with a 54T hits 80MPH!!!!

Riding now at high sustained power is no longer an issue. No more worries of blowing the motor. The motor can take it. Coupled with our huge 72v 55Ah Latest V3 battery, range is no longer a worry (although sustained high power will still drain it quicker than riding slower).

How far does the bike go? Sorry that’s just an imposable thing to state, as we all weigh different, ride differently. But the 55AH battery is almost 3 times more energy dense than a standard battery. So if you ride the bike in one of the power modes, similar to standard bike on (Our kit barely goes that slow!). You’ll go three times further. In real world trail riding, you are much more likely to get tired and ache before the battery runs out. We often go out for three hour rides in the North Devon: hilly trails, woods and muddy paths. On the road at 30 mph your looking at 50miles (guessing as once again we don’t rid that slow), but speed up and it drops but at 45Mph, riding in traffic, we get about 40+ miles although this is guess as it didn’t run out and we stopped riding with power still in tank (this we have done).

EBMX X9000 V2

Comes complete with everything needed for self-installation including plug and play compatibility for Sur Ron Light Bee, Talaria Sting

Using components sourced from reputable suppliers, each item has been engineered for peak performance, strength and reliability; from the CNC machined internals and bus bars, custom electronics design, injection molded cover and fully waterproof construction to the custom phone app to build custom tunes, this controller is raising the bar for the industry.

Whether you are trying to nail a wheelie, riding hard Enduro, competing in a race series, commuting to work, or just cruising the trails with your family the X-9000 is built to give you ultimate freedom and control.

We stock: Black, Gold, Blue and Red.  Please state on check out notes which you would like.

Kit Includes:

  • SW102 Display with custom EBMX firmware and display settings.
  • Harness extension for Sur Ron Light Bee and Talaria Sting
  • Variable Thumb Throttle
  • Air Cooled Heatsink in Black, Red, Blue or Gold
  • Harness for programmable 12v outputs
  • Free access to the EBMX App
  • All mounting hardware is re­used from the stock controller.
  • Programming cable and Blue­tooth module

Fitting tutorial are here, but we do give remote support

  • EBMX App User Manual: x-900 Android App: x-900 IOS/Apple App: application tutorial can be found here:

Dominator V3 Battery 72v 55Ah Samsung 50s 21700 cell 3960wH

Our premium battery just got better!!! We swapped out the brilliant Molicell P42A and upgraded to one of the most expensive cells money can buy: The class leading Samsung 50S 21700 cylindrical steel jacketed cells (no puffy cheap pouches here). These cells give almost 20% more range than the Molicell and can supply the monster amp draw our controllers require.

We then swapped out our standard 330A BMS for a special order 400A BMS. This means these batteries can now continuously supply 180 amps and burst to 400A. This new super high output power can now handle bikes with the extra powerful: Sotion, EBMX and KO motors; yet keep the std OEM Sur Ron motor  running for huge long rides.

We then upgraded the casing from Stainless steel 304 to marine grade 316 so absolutely no rust issues here! Super tough and powder coated inside and out.

And last of all, and by no mean feat we massively improved the internal transfer of power by replacing all the connectors with pure copper sheet. This lowers resistance, reduces internal heat and make the battery even more efficient as it delivers sustained higher power to your controller.

The main battery to controller connectors we use are the same type as used by Sur Ron but we use two sets to share “parallel” the power. This reduces heat, transfers load more efficintly and keeps the connectors from overheating.

The 72 55AH Sur Ron Battery 20S11P 72v  3960Wh Samsung 50s 21700cell. The UK retail price of these cells is over £9.99 each!! The Cells are genuine branded cells specifically designed for high output discharge and sustained high drain. Other inferior cells (pouch) used in cheaper packs simply can’t deliver like these.

For bike that do not have a display to show voltage, We include a handlebar mounted display to be located on the throttle side. Simply plug into the charge port of the battery when riding.

Battery Specifications:

Weight 19.2KG
Cells Samsung 50S 21700 (220).
BMS set at 400  Amps Peak.  Full battery protection including over discharge (shorts) over heating etc
Each cell with additional individual wrapping for added protection.
Additional layers of fibre board, Kapcon tape, heat shrink with internal/external powder coated stainless steel sealed box to give maximum protection and insulation.
Pure copper sheet for connections (not nickle sheet)
Bluetooth BMS giving individual series condition with balanced charging. We do not recommend altering our settings as may invalidate your warranty.
An integrated handle for lowering the battery in and out.
Charging port via an XT60 connector.
Battery lid hinge extenders for Sur Ron
THIS KIT DOES NOT INCLUDE A CHARGER. Chargers can be found here (10A MAX):

When connecting the battery to the bike and to avoid a spark. Turn the red trip switch on the bike to off. Connect the older original power cable and then turn the red trip to on. Then connect the new power leads. Removing battery has no special order.

Charging: First time charging is VERY important. Always connect the charger to the battery with the charger powered up from the mains. This will stop a “Connection Spark”. The battery needs a “Balance Charge” on first charge. Please charge for 12 hours first time.

Sotion Motor

The Sotion motor designed to take high power and heat. A robust motor for a Surron/Segway bike.
A direct replacement for the OEM motor that fits straight in.
We love the build quality and peformance of this motor – now our clear favourite of everything out there (and we have tried all o of them). No more crazy inflated prices of other brands.
This motor fits all Sur Ron light Bee frames, Segway x160 and x260 frames and does not need any additional fixtures or bolts.
  • PEAK POWER = 35000W
  • High 180 C temp thresholds
  • IPM syn RM rotor design
  • MAX TORQUE = 62Nm
  • SENSING METHOD = Both Hall & Encoder

Self Fitting:

We will include a 13 page illustrated set of instructions. However we do strongly advise for one of our fitters to install. We do make the assumption that if your fitting this kit yourself, you know what you are doing. All kit leaves here tested and working. Think of it like this. You buy a motor from Honda, Suzuki etc and fit yourself. You would not expect Honda to talk you through the fitting. We will not give support outside of Monday – Friday normal business hours.

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). 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 media phone/note pad and good internet connection.

We do not warranty damage caused from your fitting. Every kit is bench tested before leaving our premises.

We give UK support!!!!

* UK Warranty 

Our warranty is limited to 12 months from time of purchase . Due to the use and the nature of this device (Off-Road) and the potential excess  exposure to: water, rain, mud and the possibility to sustained high powered use/abuse, we do not warranty controllers that show signs of damage, excess heat or water penetration. All devices are fully bench tested working with a full working motor before leaving our premises. Any damage caused by your installation is not covered by our warranty. alteration may void warranty. This includes shortening of cables and changing connectors. We highly recommend the use of one of recognized fitters where installation is fully covered. Battery must be connecters in the correct connection order and failure to do say may cause damage to the BMS and void your warranty.

Warranties are not transferable.

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

*Bike not included



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 period 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 27 kg
Dimensions 50 × 28 × 35 cm