Deposit For New Customised Sur Ron 72v Pro Built to your order – Warranty – Free UK Shipping

Original price was: £7,499.00.Current price is: £500.00. (price including VAT)

New Customised Sur Ron 72v Pro Built to your order – Warranty – Free UK Shipping

SKU: 4215-1-1-1-1 Category: Tag:


New Customised Sur Ron (LBX) 72v Pro Built to your order – Warranty – Free UK Shipping

Aftermarket Controller + Battery

We Mod The Bike, Done By Professionals, With UK Warranty

*UK Mainland Shipping FREE (worth £189) or collect here in North Devon (By appointment only Mon – Friday)

Please note we only accept cash or bank transfer (BACS)

PLease email or call  01271316344



 You say what you want, we supply and build and warranty!!

Have confidence that a UK professional registered company with qualified technicians will fit your brand new bike supplied by us, with your after market modified parts and STILL warranty your bike for 12 months (please see exceptions) and HUGE savings!

We source brand new bikes direct from the UK distributor and then wave our magic on them.  The bikes arrive to us fully boxed and direct from the factory. We assemble the bikes and swap over the after market parts.

We supply you a brand new UK Sur Ron LBX to include fully fitted ASI BAC8000 and Race 72v 42Ah battery.

This is our full 72v Race kit with lid lifters, charger, bigger rear sprocket and Renthal R1 chain.

Developed specially for the new FIM Open (unrestricted) class and evolved especially from racing experience and testing with our own team rider. We have spent hours getting the maximum performance, balancing maximum power to heat and motor damage. (we can go a touch higher but the risk of overheating the motor increases massively – cant win a race if the bike over heats!).

We listened to our customers and improved and change things as this product evolved. We originally started this project in June 2020. That’s months of learning and evolving, just on this one device. We truly believe this is the very best Sur Ron battery and controller upgrade on the market for racing  this class. We KNOW that other sellers have copied our program (they say to be copied is the greatest compliment), but now that we have pushed the boat even further. Our latest program has now been revised to include MORE power! Improved thermal roll back for motor protection, no problems with up hill starts or roll backwards stalls, no cutting out, extra water proofing, higher grade materials used. Stainless steel metal work and extra added powered coating (you scotch it, it still wont rust!!).

Our latest “non steam up” display (we ditched this display that al the other still use),  allows you the rider to individually tune each of the 5 power levels to your own requirements. we found this especially handy if you want the power set up for a particular track. For example, you might want it set for a MX track near you where mode 3 is perfect for jumps, but still hit the button to flick into 4 for the straight and 5 for going ballistic. On our own 72v full race bike, we use 3 for wet muddy slippery riding, 4 for up hill dryish climbs (wheel spin is always  an issue with crazy high power) and 5 for going nuts  🙂


This controller is now tuned and dedicated for our aftermarket  battery  @ 72v (max 85V). This is  a 72v Kit and no longer wasted to work on a std 60v battery battery (our slightly less powerful ASI BAC4000 will work on all batteries). It carries around twice the mount of energy of a standard battery, so loads  more range!! (speed and acceleration kills range, so when comparing to a standard bike, you need to ride in power mode like for like)

The controller now features  a full working display showing: speed, power, battery charge, date and trip. Set with 5 power levels as default that can be flicked at the touch of a button on the fly  (just your thumb, no gloves off or stopping), Can be used like a gearbox to slip up and down the power levels (5 levels set as our default) to suite your terrain and riding style, but now totally tuneable by you (you can not turn the max power up, just set each level how you like it)

The controller comes fully potted and with all leads and looms fitted and waterproofed. The mounts are in place, stainless steel and powder coated in black.

Power levels:

5 Power levels on the fly at simple handlebar push of a button. From super echo to absolutely blistering. We don’t just make this gear, we ride too. Personally in heavy mud and soft slippery conditions (where you don’t want to spin out all the time and actually stay on the bike for the full ride), or blasting around the streets (road legal bikes obviously) and is  a good compromise between power and range, mode 3 is enough.

Hit mode 4 for that extra grunt needed for deep sand or on the street, getting a  “wiggle On” (mode 4 will also prolong the time before thermal roll back kicks in under very hard use).

Mode 5: “When you absolutely, positively got to kill every motherf***er in the room, accept no substitutes” (quote from Pulp fiction). Mode 5 should be used and thought of like an after burner from a video game. At full power sustained open throttle, thermal roll back will come in, if used for too long and start to slow the bike down. It should be used when you want extreme bursts, like on a MX track. You don’t need the full open throttle all the time, but when you want it, its there. Like to fire out of a corner or hit that BIG jump – mode 5. Its not designed for full open constant use (that’s mode 4), but you can leave it in this mode, just not full on, all the time – get it?

Please note that running on full power for your type of battery, non stop with a wide open throttle is not a good idea and effectively red lining the motor like on a petrol bike. We strongly recommend that you upgrade to our heavy duty bash guard to increase air flow over the motor, make your frame stiffer and take heavier knocks. Increased air flow over the motor (cooling) will increase reliability and stop thermal roll back kicking in so quick (where power is reduced temporally to help the motor cool). However if you do ride very very hard and get close to overheating the motor, Our new improved thermal roll back will gently cut the power until the motor cools enough to accept full power again. This only tends to happen if your riding full open throttle down a very long straight (road).

Unleash more performance and range with correct gearing.  Higher gears (Smaller rear sprocket) does not mean higher top speed. Over labouring the motor with the wrong gearing costs top speed, acceleration and range.

A fast efficient spinning electric motor goes better – simple!.

Our recommendations for a fully equipped 72v system:

Pure Off-road/MX Race:      10-14 stone rider 58T.           15-17 stone rider 60T.        18+ stone rider plus: 60-64T


Others copy, se we improve and change. The old APT display (as used by everyone else) had a tendency to steam up on a hot day if  the  bike had been washed with a hose or exposed very heavy rain, So guess what? we went to another display manufacturer and had another display developed just for us. We are the only Sur Ron kit that now uses our dedicated display. Its got our programming and logo on it, so lets see how long before we are copied again (PS, its really good to use)!

The latest display does allow you to set each of the power level to the way you like, but NOT increase the overall power.

Race Battery V2.5 72v 42Ah Molicel P42A 21700 cell 3024wH

(58% bigger capacity than a 60V standard battery, but due to a better voltage cut off is near 100% more range if used at the same power)


Any parts can be altered and colours altered. Price will be changed to reflect.
Terms and conditions
Cash or bank transfer or reciept of invoice (Lloyds commercail UK bank in the name of Electron Cycles Limited)
£500 ordering deposit 2 week lead time with new UK Sur Ron L1E, bike (there is a lot of fitting to undertake).
The £500 deposit will expire after 60 days and will not be refundable
50% balance payment required before commencing upgrades  (less £500 received)
Final payment on completion and prior to delivery.
Delivery within 7 days from build completion from courier.
All original parts removed to be kept by Electron Cycles
NB colection here in North Devon avaialble with £100 refund.

* New Modified bikes have OEM controller and battery removed and not included in the sale, Any other “Pull Offs” also not included

* UK Warranty 

Warranty Terms: Main components: Battery/Chassis/Swing Arm 12 months (Battery up to 20,000 miles max)
Other parts 12 months excluding service items. Subject to service schedule. Competition use 30 days only.
Controller and battery are 12 months warranty but not due to water ingress. All warranty issues, the customer must return the item back to us at their own cost. Drive train (sprockets, gear box and OEM motor) is not warrantied, but aftermarket KO motor has 12 months). Any tampering with any of the parts including controller may void warranty

Warranties are not transferable.

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 recognizes 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 85 kg
Dimensions 50 × 28 × 35 cm