Upgrade Kit

(193 reviews)
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By far the most popular upgrade available, The Upgrade kit includes a new motor controller and new color display.  The combination allows you to finally unleash the full potential of the stock motor and battery.  This is THE upgrade kit your friends have been talking about.

35a controller and New Color LCD8H.

Plug and play for 2016-2018 Rover bikes. Please note that the controller has a tail light plug that will not be used. We do not recommend upgraded lights as it can burn up the headlight circuit.

Plug and play for 2019-2021 Rover models. (Up to Rover 5) (Not compatible with Rover 6)  Will only work with stock 200 lumen headlight, will not work with the 500 Lumen headlights. THE 500 will burn up your controller.

Mini - Although also typically plug and play for 2018 and prior, this controller is substantially larger than stock and will not fit inside the frame or stock mounting locations.  May have a different battery plug.  Please check your bike and photos before ordering.

City or Wagon - Untested, but customers have reported it works well. Setting adjustments may be required. Controller may not fit correctly. Additional mounting hardware may be required.

Rover 6 + STEPOVER & STEP THROUGH- Does not work

Runner - Tested and working!

Rad 5Expand - works

Mission- Works, we recomend turning max power down.

Runner Two - Untested by Area 13, but customers have reported it is compatible.

Runner Plus - Tested and Working. NOT COMPATIBLE WITH 500 LUMEN STOCK HEADLIGHT.

Works with all European/Canadian models except Rover 6

Compatible with both 48v and 52 batteries.  (NOT recommended for 60v)

Dimensions: 7.5" x 3.25" x 1.75" 

How to Program:

The LCD screen has a handlebar mounted switch with three buttons, UP, DOWN, and a center Power button. 1. Start with battery and handlebar switch on. The LCD will be off.

2. Turn on LCD by pressing and holding POWER​ button. Holding the UP button will turn on the backlight if needed.

3. Within 5 seconds of turning LCD on, press and hold BOTH UP​, and DOWN​ buttons for a few seconds to enter the settings mode.

Brief explanations are as follows.

P1 Motor Characteristic Parameter Setting Mode (100, 46 for direct drive motors on the Radcity or some Radwagon models)

P2 Wheel Speed Pulse Signal Setting Mode (5, 6 for upgraded 750w motors)

P3 Power Assist Control Mode (1)

P4 Handlebar Startup Mode (0)

P5 Power Monitoring Mode (15)

C1 Power Assist Sensor and Parameter Selection Mode (3)

C2 Motor Phase Classification Coding Mode (0)

C3 Power Assist Ratio Gear Initialization Mode (1)

C4 Handlebar Function Setting Mode (0)

C5 Controller Maximum Current Adjustment Mode (6)

C6 Backlight Brightness Adjustment Mode (3)

C7 Cruise Function Setting Mode (0 or 1. Setting to 1 enables cruise. While riding, hold the DOWN button to enable cruise control. Using the throttle or brakes will disable the cruise.

C8 Motor Operating Temperature Display Mode (0)

C9 Power-on Password Setting Mode (0)

C10 Automatic Restore Default Setting Mode (n)

C11 Attribute Selection Mode (0)

C12 Controller Minimum Voltage Adjustment Mode (4)

C13 ABS brakes of the controller and parameters of anti-charge control (0)

C14 Power-assist tuning parameters (1)

Press and hold POWER at any time ​to exit the setup mode.


* This is a universal kit. New controller may not fit in stock location and physical size may be different.

I cannot get my headlight to turn on:

Long press the UP arrow to turn the lights on and off.

Pedal assist is not working properly:

  1. If after adjusting the settings your pedal assist still does not work, check the following cables to ensure they are fully plugged in, check the pedal assist sensor connection. Make there is no bent or pins, and it is fully seated together:
    • Pedal assist connector (yellow 3 pin coming from sensor)
    • Motor Cable
    • Main wiring harness (the one typically ran through the frame). Make sure there is NO bent pins
  2. If all the connections are good and no damage done to the pins or connectors, try changing the C1 setting to 2. 
  3. If it still does not function, please check to make sure the motor works with throttle to eliminate a different type of problem.  If throttle works but the pedal assist does not, the next step would be a different pedal assist sensor, or the stock motor controller and display.  This should narrow down where the problem is occurring.

“Motor position sensor fault” or “Motor or controller short circuit fault!”:

In nearly all cases of receiving this error, the motor cable is not fully seated.  Please note that the arrows can sometimes be up to 1/8th turn off.  The cable should be firmly seated with the lines around the circumference of each half of the plug nearly flush.  Wiggle back and forth on both cables and push firmly together. 

I have a 48v battery, but it says 53v (or similar):

This is perfectly normal. A 48v battery when fully charged will be about 54 volts. 

My battery voltage is over 48v, but the gauge reads empty:

Take the bike for a ride! Depending on settings it may be waiting for calibration.  A few seconds of riding should fix this. If the problem persists, check the main harness connection coming from the controller through the frame and up to the handlebars. Check for any bent pins. A single bent pin will cause issues.

My speed does not read correctly, it jumps up to 49mph when coasting (and/or reads 0):

Please verify your P2 setting.  An incorrect setting here will cause the wrong speed to be displayed when coasting. Also make sure you have the correct wheel dimension (DIM). The dimension is the overall tire diameter, not just the rim size. P2 = 5 for stock motor. P2 = 6 for upgraded Bafang 750W motor.

RadCity and RadWagon (direct drive motor):

Note that some settings may need to be changed for proper operation. P1 is determined by the number of magnets or poles in the motor as well as the gear reduction.  As the RadCity and older RadWagon have a direct drive motor, use the setting 46 for P1. P2 may also require a change for a correct speed reading.

Motor or system shuts down while riding:

Adjust your C5 setting to a lower current output. Settings 0-2 are different take off speeds followed by max power. 3 is the lowest current output and 10 is the highest. Take the bike for a spin and adjust the current output till you find a happy medium the controller and motor are happy with. For stock motors, we recommend 5 - 7 for C5.

CHECK OUT THIS YOUTUBE VIDEO FOR STEP BY STEP SET UP. https://www.youtube.com/watch?v=B0F6x8V0NZQ

*The Upgrade Kit is created for specific models of Rad bikes, and that name is used for part compatibility or identification only. We are not affiliated with that company and this item is an aftermarket part.

PDF Manual available here.

Power Settings



  • 5
    RadRover 5 controller...

    Posted by Larry Moore on Feb 16th 2024

    The controller was shipped and arrived promptly. The instructions and video made it easy to install. I really like the extra torque that it provides for getting up some hills that were a struggle before. Great upgrade.

  • 5
    Outstanding upgrade for Rad Runner...

    Posted by Joe Pientka on Feb 11th 2024

    Bought a European competitors LCD control last year and it was ok. I shoulda bought this instead. It’s really helped unlock torque for this bike in the hills of Marin. Great product and company. Very happy - plug and play. Took 30 minutes to install. If you are reading reviews you are considering the upgrade - do it.

  • 5
    35 amp...

    Posted by Jon Peterka on Feb 2nd 2024

    Easy install, the added torque is awesome. Made my Radrover what it should have been from factory.

  • 5
    Haven't yet received the...

    Posted by Paul Gifford on Jan 22nd 2024

    Haven't yet received the kit

  • 5
    All around great...

    Posted by Trent gillispie on Dec 20th 2023

    I was completely impressed with the upgrade it has a lot more low end power and it goes a lot faster as well much more fun to ride I couldn't be happier thank you

  • 5
    A new better...

    Posted by James Donald on Dec 14th 2023

    I indeed do like your upgrade kit, I own three, before sluggish and slower, now a force to be reckoned with, don’t need speed to thrill, I need speed to stay out of certain areas and it’s tried and proven, never leave pas2, rarely leave 4th gear, you guys put together a really nice kit, well done! RR5, Rad mini4. The newest one is a back up. Thanks!

  • 5

    Posted by Jeff Stanley on Dec 13th 2023

    The controller was very easy to install. Only problem is connection to motor arrow don't line up. Shipping to Canada was great. Works great on Rad mini.

  • 5
    Rad River Upgrade...

    Posted by John Reeves on Dec 12th 2023

    It’s not been installed yet. It’s a Christmas oresent

  • 5
    Radrover power...

    Posted by Chris Amici on Dec 9th 2023

    Purchased Radrover controller and display upgrade, it works awesome. More power and very nice color display. I had a question about the install and got a quick response to help me out!