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Please note that except for 250w kits, the kits below are not UK road legal and use on public highways is therefore at the rider's risk.
All prices include shipping to UK addresses. Shipping surcharge to other EU countries: £15.

36V systems

250W 36V 15A BBS01 kit£359
36V 13AH (Samsung) battery kit with charger £299
BBS01 36V 250W + 13AH battery kit, save £20 Total combo price £638
BBS01 36V 250W + 15AH battery kit, save £20 Total combo price £684
500W 36V 25A BBS02 kit, very high torque £389
36V 14.5AH (Panasonic) battery kit with charger £345
Buy both items 36V 500W + 14.5AH battery kit, Panasonic cells, save £20! Total combo price £714
Hydraulic brake sensors for BBS01/BBS02: £16 per pair.

Installation time: approximately 2 hours
Please email us a picture of your downtube before ordering. We'll prepare the battery's mounting plate to suit your bike.
See picture.


The 8-Fun BBS01/BBS02 kit is good for:

  • - hilly terrain
  • - bikes with standard 68mm-73mm bottom bracket
  • - the kit will work with any wheel size: 20" to 29" wheels
  • - minimalist fitting

This kit is not recommended if:

  • - your bike does not have standard bottom bracket (some bottom brackets have long shells, 72mm and above. This kit won't fit).
  • - you have a downhill bike (the motor would be slung quite low and may get damaged easily).

Please download and read the user manual before purchasing
/cdkit/BBS01Manual.pdf

and watch this video:
youtube.com/watch?v=akA1vg5fcwY
youtube.com/watch?v=irmyv9G9WyU

further reading, settings accessible from the C961 LCD:
/manuals/c961.pdf

Important points to check:

  • - is the welding of your bottom bracket too weak to host this kit?
  • - You will lose your front derailleur, is this OK for you?
  • - where are you going to fit the battery?
  • - will the supplied brake levers work with your bike?
    If you have hydraulic brakes, the supplied brake levers are cable operated, so they won't work.

This kit is sold with special conditions:
- You agree to get the kit installed by a competent bike mechanic with good knowledge and experience of e-bikes.
- You agree to use the product within the manufacturers specifications (15mph).
- You accept full responsibility for possible dammages to your bike, battery and consequential losses due to the use of the kit.

Limited guarantee:
- Guarantee is void if you connect the kit to an unsuitable or faulty battery.
- The product is guaranteed for 1 year return to base, repair or replace at our discretion.
Below is the list of recommended grease/lubricant used in the Bafang motors at factory:
Bearing grease - Unical Lithium grease No 2.
Plastic gear grease - Unical Aviation Synthetic Grease AG-11.
Metal gear grease (Black)- HCF Lubrications Technology Co Ltd's MG - 2A grease.
Metal gear grease (white) - Unical Polybear Grease BLD 227B.

25A 500W CDkit:

(this is an old picture for illustration, current stocks are manufactured within current year)

Specifications
For full specifications, please read the user manual
VoltageDC 36 Volts
Limit current (max. continuous)15 Amps or 18Amps
Motor Weight3.7kgs (15A), 3.9kgs (18A)
Max crank speed78 +/- 5 RPM
Chain ring46 Teeth

What is in the kit?
- motor
- crank arms
- brake levers for cable operated brakes.
- thumb throttle.
- 46 teeth chain ring.
- round black plastic chainguard.
- LCD display.


Why choose a chain drive?
A hub motor can only deliver limited torque, fine for flat roads and easy gradient but on steep hills, the motor will slow down, its efficiency and output power will drop rapidly.
A crank drive motor transmits power to the chain which can be adapted to the terrain using gears.
A CD motor can then be kept running at optimal speed all the time, saving battery and provides maximum power.
So if you want to ride hills, a chain drive bike is a must.
A crank drive motor performance chart:


Easy controls
Before riding, press the on/off next
to the trip computer on the left handlebar.
There are 3 level of pedal assist, 1 provides the least
assistance, 3 the highest.
Level 0 is no assistance to pedalling, you can still use the throttle for instant power if you need to.
Press the + and - button to select the desired level.
If you start pedalling, the pedal assist sensor will sense
that and supply about 80% of the energy.
The bike will woosh you along nicely - the motor is very quiet.
Maximum speed is 15mph and computer controlled.


Installation in 6 steps

Download and read the BBS01 Installation Manual
Download and read the King Meter C961 LCD Manual
1) Remove your bottom bracket and front derailleur
2) Insert the motor and install the motor hanger, fasten the bottom bracket.
3) Install the battery.
4) Install the LCD.
5) Connect the waterproof cable and the battery cable.
6) Install the thumb throttle and the brake handles.


36V 14.5AH minimum, 15AH typical(Panasonic cells) battery kit with charger



Panasonic 18650PF 2900mAH cells.
High discharge rate BMS
Supplied with 2A charger and fitting kit
Price inclusive of shipping to UK: £315
Price inclusive of shipping to EU: £330
Motor marking
Motor specifications and serial number are printed on the underside of the motor.
The first 4 digits are for the year and month of manufacturing (see picture on the left).


BBS01 cdkit

BBS01 cdkit: push fit waterproof wiring
Minimal wiring: connect just the battery, LCD (and throttle if you wish)

BBS01 cdkit: wiring diagram

BBS01 cdkit: waterproof connectors

BBS01 cdkit: waterproof connectors

Test bike fitted with the BBS01 CD Kit:
(last year white LCD, this year black LCD, same size)



General look with 36V 15AH HL battery kit:
(Thank you John P., your bike looks lovely).



Installation:



The BBS01 kit (shown without the LCD, pedals not included)


Make your own hydraulic brake sensors from the supplied levers

Many thanks to Terry Bell for his picture and notes.

The brakes are Hope Mono Minis.
As I remember it, once the magnet and spring have been removed from
the switch, the switch housing is free to be slid over and off the end
of the reed switch.
The reed switch has been covered in a piece of twin core flex sheaf
and glued and zip tied to the lever mounting.
A couple of pieces of the wire have been plugged into the end of the
sheaf to keep the water out.
The magnet has been glued on top of the brass pin that connects the
lever to the hydraulic piston.

home-made-hydraulic-brake-sensor


GSM 18A CD kit with internal controller

Conform to EN15194. Motor rating: 36V 250W nominal. Controller rating: 18A max.
Price including delivery: £279.
Choice of twist grip throttle or thumb throttle.
Combo GSM 18A kit + 36V 13AH HL battery (buy both, save £20): £558.
Combo GSM 18A kit + 36V 15AH HL battery (offer, save £25): £599.
Motor on its own and without built-in controller: only £199.
Buy online:

Go to the online shop, click on the link for 'Conversion kits' on the left sidebar.
Select 'CD GSM Kit 36V 18A 250W' on the main contents.


General look:
Lever and grip
LCD on handlebars
Lever and throttle
Click here for hires version
GSM CD kit
Customers' pictures (thank you Franck L):
KMX Cobra 1
KMX Cobra 2
KMX Cobra 3
Customers' youtube video (thank you Davidg):
https://www.youtube.com/watch?v=-coOQRKK1_8

This kit comprises:

  • GSM crank drive motor rated 250W nominal
  • 46-tooth chain ring
  • Integrated 18A controller
  • Waterproof Julet cableset
  • ATS800 large display LCD
  • A pair of sensored brake levers
  • Thumb throttle or twist grip throttle
  • Speed sensor with spoke magnet
  • Battery cable

Features:

  • Quiet sine wave controller with Hall
  • 18A maximum current limit
  • Maximum torque 65NM
  • Maximum RPM 86 rpm
  • 46T chainring
  • Road legal
  • One year guarantee within normal use
Walking mode is no longer supported on the current version of controller software
GSM CD motor

Installation:

Download and read the GSM CD kit Installation Manual
Download and read the GSM CD kit 800S LCD Manual
Download and read the GSM Greasing guide

Installation in 6 steps, time: about 2 hours

1) Remove your bottom bracket and front derailleur
2) Insert the motor and install the motor hanger, fasten the bottom bracket.
3) Install the battery.
4) Install the LCD.
5) Connect the waterproof cable and the battery cable.
6) Install the thumb throttle and the brake handles.

GSM CD trunk cable
Connectors and cable lengths

Installation with drip loop

inside the 18A GSM motor
GSM CD inside motor
the AT 800S LCD
GSM AT 800S LCD

GSM CD motor without controller

Supplied with a pair of Neco cranks. Simple connections to controller via two waterproof leads: 9-pin motor connector and 3-pin pedelec connector.
Left and right cranks shown on pictures are Neco brand. Supplied cranks may vary.
Conform to EN15194. Motor rating: 36V 250W nominal.
Price including delivery: £199.





GSM CD motor

Features:

  • 9-pin motor cable. Picture
  • Maximuum torque 65NM (36V)
  • Maximum RPM 86 rpm (36V)
  • Road legal
  • One year guarantee within normal use

Installation

Download and read the GSM Motor Installation Manual for external controller kit

Installation in 6 steps, time: about 40 minutes

1) Remove your bottom bracket and front derailleur
2) Insert the motor and install the motor hanger, fasten the bottom bracket.
3) Connect the motor to your controller kit.

GSM CD motor connections

Greasing the motor

A bit of moly-grease will make your motor run much quieter.

https://www.youtube.com/watch?v=3lVRTRFueUU


GSM CD motor with 15AH HL battery
GSM CD motor with 11.6AH battery