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Fault

Motor does not fit in 

the bottom bracket

Motor does not fit in 

the bottom bracket 

(cont.)

Wiring to a part of the 

kit is not long enough

Drink bottle holder 

bolts won’t tighten

Handlebar too 

crowded

I have hydraulic 

brakes, or integrated 

shifters and brakes

I don’t want to use the 

pedal assist, or don’t 

want to use throttle

 

Solution

 

Any bike with an internal bottom bracket between 68 and 73mm 
wide will be compatible with this kit. If the bottom bracket has 
any small defects like a bur or foreign particle in the way, you 
may need to use a file to smooth these out. The mid drive kit 
requires a very good fit and this can make it quite stiff to install, 
but it will fit!
Unfortunately there are always going to be rare cases when a 
manufacturer of a bike has decided to be different. If this is the 
case and there is not enough thread extending out the other side 
of your bottom bracket (requires 10mm+) or the motor simply 
won’t slide into your bottom bracket if the diameter is too small, 
you may have to seek assistance from a bicycle mechanic or 
preferably. The motor spindle that slides into your frame bottom 
bracket has a diameter of approximately 33.3 mm so your bottom 
bracket should also have a diameter around this value.

 

 

 Please contact us for longer wiring.

You may require some longer bolts. The bolts should thread 
into your frame a reasonable amount as they will be holding the 
battery to the frame and this connection should be as structur-

 

ally sound as possible. If you feel as though the bolts aren’t long 
enough, please get some longer bolts as using bolts that are too 
small may cause the thread to strip.

 

If for instance you have integrated shifters, you might find that 
with the throttle and shifter on the right side, you have run out of 
room. If you can’t manage to shuffle everything around to make 
room, you may prefer to opt for a thumb throttle.

 

If the e-brakes provided are not ideal, either you can elect not to 
use e-brake handles (the kit will still function) or you purchase 
from us e-brake cut-off sensors which can mount to your existing 
brake handles, no matter what kind.

 

The controller is configured so you can run both the pedal as-

 

sist sensor, and the throttle, or one or the other. If installed, the 
throttle will always act as an override. 

23

TROUBLE SHOOTING CONTINUED...

Summary of Contents for BBS02

Page 1: ...CONVERSION KIT Please read through carefully before beginning your conversion User Manual Mid Drive Electric Bike Kit BBS Bafang Mid Drive BBS01 BBS02 BBSHD English...

Page 2: ...es are manufactured differently that certain components of your bike may remove or install differently and or contain different steps However we have used a bike that is quite universal to demonstrate...

Page 3: ...eur Removal 8 9 Motor Installation Crank Installation Battery Battery Cradle Installation Brake lever and Thumb Throttle Installation Display Installation Pedal Assist Sensor installation Wiring Insta...

Page 4: ...ether on your bicycle Before you begin your conversion it can be helpful to lay everything out first and make sure all the parts are there Something missing Double check the box even under the flaps T...

Page 5: ...sion kit 3 Ride Oncethe battery is fully charged you ve checked your tire pressures and fasteners you re now ready to go 5 Prepare Your bike Before installing certain components of the kit your bike m...

Page 6: ...demonstrate the crank removal process to aid you Firstly flip your bike upside down so it rests on the seat and handle bars This will make working on your bike easier If you have a bike stand you coul...

Page 7: ...art of the crank removal tool into the black part as shown in photo 2 and using the multi sized spanner continue to thread the silver portion in until it forces the crank to pop off the spindle You sh...

Page 8: ...rt this tool into the bottom bracket cup then the bottom bracket cup must be loosen edusing the ratchet until it can be removed This should also be done to the bottom bracket cup on the other side of...

Page 9: ...bout the front derailleur as it is not needed in the BBS motor conversion you can simply cut the derailleur in order to remove the chain If you would like to keep the front derailleur as a spare part...

Page 10: ...nstallation is to slide the shaft of the motor into the bottom bracket of the frame as shown in photo two Photo three shows how the motor should be pressed up against the down tube of your frame befor...

Page 11: ...e tightened to 50 60 Nm of torque using the bottom bracket lock ring tool as shown to the right in photo 2 Now the Bafang lock ring can be threaded on to the motor axle This lock ring should be tighte...

Page 12: ...ghtened with an allen key as shown in photo 2 Your pedals can now be reinstalled using the multi sized spanner included in the BBS tool kits Most pedals will have a 15mm spanner size Lastly your chain...

Page 13: ...Next make sure you have removed the two bolts where the drink bottle holder goes shown in photo 2 Finally align the slots in the cradle with the holes in the frame Insert the two bolts through the cr...

Page 14: ...personal preference which side the throttle goes Slide the electric brake levers onto the handlebars Once the throttle and brake lever are in a comfortable position tighten your brake lever PLEASE NO...

Page 15: ...y can depend on the rider style or the shape of the handle bars Attached to the Display is also a Pedal Assist Controller This Controller also has the On Off button on it The way this controller works...

Page 16: ...oosened apart and then placed onto a spoke and tightened so that the magnet will be opposite and parallel of the sensor as shown in photo 4 The purpose of the pedal assist sensor is to generate a sign...

Page 17: ...hoto At the end of the wires are arrows align the arrows and then insert the pins 2 Then wire the pedal assist sensor to the motor This wire as shown in photos 2 has a plastic cap that threads on afte...

Page 18: ...ties being used to bundle and secure the cables coming from the base of the battery motor pedal assist sensor wiring loom and anything else leading up to the handlebars Also included in most kits is...

Page 19: ...ip your battery back to us to have the barrel replaced not ideal The battery should never be ridden or turned On without being locked into the rack It should also never be dropped or treated roughly I...

Page 20: ...charger indicator lights should glow red whilst charging 5 Once the charger indicator lights change to green the battery is fully charged There is no way to over charge the battery When it is full the...

Page 21: ...very few months It never hurts to go over your bike with tools tightening and checking everything that can be checked This will ensure you have a safe and well serviced bike Keep your bike clean There...

Page 22: ...ugh slack in the motor cable Motor runs backwards Remove the motor from the frame and switch the direction Display won t turn on unless the battery charger is plugged in A high pitched rattling noise...

Page 23: ...or preferably The motor spindle that slides into your frame bottom bracket has a diameter of approximately 33 3 mm so your bottom bracket should also have a diameter around this value Please contact u...

Page 24: ...ttery is locked to the cradle and not loose A momentary discontinuity in power will turn the kit off My battery cuts out intermittently If the battery is low on power or you are going up a very steep...

Page 25: ...g green to indicate that the battery is fully charged 3 LED LCD Indicator Light Running Low Some customers find that the LED LCD charge indicator can lead them astray in terms of how far the bike will...

Page 26: ...26 CONTACT US CQ GROUP INTERNATIONAL LIMITED Nanying industrial zone Foshan city China Email support elecycles com www elecycles com...

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