Bafang BBS02B 36V 500W Mid Drive Motor Kit -

The Bafang mid drive motor kit is a popular ebike conversion kit, which we have been supplying since 2014. This tried and tested ebike kit is well regarded within the ebike community, with spare parts and installation / maintenance information readily available online.

The Bafang BBS01B 36V 250 watt mid drive motor kit offers a good combination of strong torque, high efficiency with low power consumption and noise output. The motors central mounting position results in a balanced low center of gravity, with power output transferred through the bikes drivechain, meaning the motor can operate within its optimum RPM range.

The Bafang kits we supply are the newest version available, with dedicated light and gear shift sensor connectors.

Battery pack is not included with the Bafang motor kit. Click here to view battery listings. Motor kit would be compatible with 36V battery packs only.


Included Parts:

Bafang Mid Drive Brushless Motor (internal controller).
LCD Display C965 + Operation Button (options include Colour 500C, Colour DPC18) .
Thumb Throttle.
46 Tooth Chain Ring + Plastic Chain Cover (options include 44T, 48T Chain Ring).
2 x Brake Cutoff Levers (options include hydraulic brake sensors)
Left And Right Crank Arms.
Speed Sensor + Magnet.
1T4 Wiring Harness - Waterproof Quick Release Connectors.
Fixing Plate.
2 x M33 Nuts.
2 x M6*12 Cap Head Allen Bolts.
5 x M5*10 Cap Head Allen Bolts.
5 x Self Tapping ST 3.9 Screws.
1 x Installation Spanner.
1 x Crank Extractor Tool.



Voltage: DC 36V
Power: 500 Watts
Current Limit: 25A
Motor Weight: 4.25KG
Controller: 9 Mosfet, Intergrated With Motor
PAS Sensor
BB Length: 68mm-73mm Standard Threaded BSA Type
Max torque: >100Nm
Max Efficience: 80%
Waterproof Grade: IP65


Additional Info:

The Bafang conversion kits can be fitted to standard bike frames, through a simple installation process. The donor bike should have a standard bottom bracket width between 68-73mm (not exceeding 73mm), with an inside diameter of approximately 33.6mm - 33.9mm. Longer bolts and washers are included for bikes with a 73mm bottom bracket shell. Carbon frame bikes would likely not be compatible with the Bafang mid drive motor kits, due to increased shell thickness.

The Bafang kit is supplied with a 44T, 46T or 48T tooth single chain ring, so if your bike has a front derailleur it will not be required. 

The supplied brake cutoff levers are cable operated, so will not be compatible with hydraulic brakes. Should you require hydraulic brake sensors including with the kit, please select this option from the drop down list.

We add additional high quality Mobil SHC 100 Synthetic Red Lithium Grease to the secondary reduction gears before dispatching motor kits.

Motor kit is intended for off road use only, as it exceeds the legal power limit of 250 watts. Click here to see government guidelines covering electric bikes.

We are a UK based company, with all stock dispatched from within the UK. Motor kits comes with 1 year limited warranty.

Nick B.

This is second one of these I bought so I can have 2 bikes but share a battery. Great motor, but didn't like the default settings at all. The lowest PAS settings where too powerful and the throttle was full power up to 25mph on any setting. Anyhow I used the USB programming cable I used on the previous and the Penoff programming code to reset things. Basically set each PAS level X to Xx10% current and throttle according to PAS level (eg level 1 is 10% max current, PAS 2 is 20% max current etc). And reset top speed to 16mph. This is perfect for my usage. Installed on Dahon folder so ideal to take on train, bus etc. Good and prompt delivery service from Eclipsebikes. Review submitted 09/26/2018.