72V BBSHD FOC Controller Upgrade ASI BAC855 3250W Electron tunable PAS Display, Cover, Loom
This is the fastest 72v BBSHD upgrade solution in the world.
Higher Volts, Higher RPM Higher Speed !
* UK Warranty
This purchase the controller will be set to 72v (Please see 52v listing for 52v use)
International orders wil be charged additional shipping – sorry no EU orders.
This is very latest controller with enhanced feature (see photos)
This is truly plug n play and expect RELIABLE speeds of around 45+ MPH (Depending on Battery choice)
Did you ever wish your BBSHD went substantially faster, pulled harder and you didn’t have to be told you can’t buy the controller you want – shush it’s a secret?
This controller has everything: field weakening (allowing higher rpm), set maximum amps, set maximum watts, maintain these figures while volts drop, totally plug n play and potted to 100% waterproof.
Advanced processing and state of the art allows it to compute much faster and much more accurately than the standard Bafang unit (or any modded Bafang controller). Imagine your first media phone in comparison to the latest Iphone/Android device? – Things have moved on and these Canadian devices have not been designed with penny pinching mass market sales like the original. All of this makes your motor pull much harder and release around 15% more speed than a 52v 50A Bafang controller and whopping 100% more power than the standard and go 72v 200% !!!!!!!!!, while still using your standard display! (NB, please see our note about displays). We might add the power is designed to come in without the mechanical snapping lurch of an inferior set up.
These controller have been set up so that it can handle anything from 50A (90 A burst) up to 3250W (easily within their design). This might mean a little explaining:
We have tested the BBSHD to destruction and on more than one occasion right up to 4500 Watts and learned a few things, real facts and not the odd exception.
Amps create heat, heat weakens the nylon gear and too many watts snap the pinion. So how do we get around this? Simple, know the limits but don’t get too close. Sure these are now nearer the limit, but ridden correctly (let the motor spin and don’t labour in the wrong gear), a reliable ride can still be had. At the lower volts where big amps are needed, we have capped the limit to 50A but as you increase your volts, we capped the watts to 3250 W. A ludicrous controller at 50A has 2500Watts – so does ours, but now add 10 -15% improvement through field weakening!
But here it gets even better, Change your battery and go up to 20s 72 V (any voltage form 10S to 20S, 36V -90 V) and the controller takes it (not a Bafang originated 60 V cap). Your watts have now jumped to a dangerous 4200 watts on a “hot” (fully charged battery at 84 V), so we reduce this limit to a safer 3000 W, but still so much powwweeeeer!
Now with Electron tunable PAS display (Email request for extra tuning required after purchase)
We ship the controller with 9 power levels
PAS function is available with a choice of up to 3 – 5 – 9 levels via the display.
Electron tunable PAS display display Rock Solid reliable – no updates, no programming and no leaky cases.
Colour display, watts speed choice of power modes
Bafang and Egg-rider displays DO NOT WORK WITH THIS SYSTEM
48v -52v (up to 60V) Bafang display (PAS will not work)
Over 59V you must buy our full kit.
Please note that the Bafang speed sensor was not designed for this unit and can become inconsistent with higher speeds
The controller is locked to protect our intellectual property
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 (Up to 9000RPM)
- Silky smooth throttle control and responsiveness, like a fine adjustable knob on a dimmer switch.
- 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
- Can use Bafang display (Assist Modes are incompatible at the moment, other readouts would work, but you will only have one assist level which max power / speed)
- Includes 3D Printed Cover
- Usable voltage is 36V-92V
- Programmed for 3250W, # of Assist levels (Power / Speed Map) are set within the display and will scale accordingly. Example Assist 1-3, Assist 1 = 33% Power / Speed. Assist 2 = 66% Power / Speed. Assist 3 = 100% Power and Speed.
- Dimensions 81mm x 55mm x 39mm
- xt90 Power Connector
- Weight 300 grams
The kit includes:
ASI BAC855 36V – 90V FOC 90A
Wiring loom to connect direct to existing BBSHD loom with Anderson Power connectors (please ensure you waterproof the white connector on the controller when) installing)
Motor side cover
Electron tunable PAS display (Email request for extra tuning required after purchase)
This purchase the controller will be set to 72v. This can be changed by us on request FOC one time via remotes session if you have a Bafang programming lead
When ordering please supply your wheel size – thank you
Gearing (video tutorial to follow or call for explanation):
Use a 42T front Chain wheel to “Clam Shell the motor and bring the chain line inbound – we sell a cheap Lekkie clone version)
Reduce your rear cassette size to improve the chain line, removing any gears smaller than 15T and create your perfect centre-line around the 26T/28T rear sprocket (depending on wheel size)
Remove the old 9 -10=11 speed cassette and use the gear range from 15T to lowest gear. We love the Shimano XT CS-M771-10 speed cassette as shown in the photo. Use spacers to give you a perfect chain line for the gear of your choice. For 27.5 and 29er set ups we recommend a 28T rear gear. For 26″ wheels a 26″ T gear. For fat bikes as big as you can get! (32T +)
If you want to be very smart, you can use a 2.35 mm spacer from your old cassette to space out a 17T as a “Get you home” cog for pedaling or PAS assist in power level 1. But you might have to manually put the chain onto the cog. Use your old derailleur as a tensioner and give your self enough chain (we recommend KMC x10e chains) to move up and down you have. You will want to adjust your max/min screws so the chain does not slip off the outer sprockets (You may need to change these for longer screws)
Please note our controllers are locked and will stay locked to protect the hours and hours we spent programming and devolving them. Sorry no exceptions.
Photos of rear gears and spacers are not included
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)
Liverpool (Hyton – PowerEbikes)
Graham C I don’t think the BBSHD is weak as people say. Abuse it yes and something will fail just like any mechanical product. My motor was purchased from Francis Janssen in November 2017. Since then I have completed 7000 miles with approx half of those miles with a Luna Ludicrous controller fitted. My 20 miles daily commute, downhilling, bmx tracks, trails the lot ! I’ve not touched anything internally on the BBSHD and it’s running better than ever, all these stories of nylon gears failing I’m sure is down to the rider, have some mechanical sympathy and you’ll be fine. As Francis states I have now fitted the ASI 800 running on 72v, I followed his advice, got my chain line in order, correct gearing and 500 miles later she is absolutely flying, a weapon indeed. It’s far exceeded my expectations, high revving, smooth ramp up of power, throttle response, acceleration is crazy compared to the Ludicrous, top speed, all fantastic and so much fun, it does not feel like the motor is working hard. I am extremely pleased. I can thoroughly recommend this conversion and Electron Cycles ( Francis Janssen) for there professional services. Go for it !
* Warranty, due to the nature of use of these devices (off road) warranty is limited to 6 months from date of purchase
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.