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Having eliminated various other avenues of possible problems with my old powabyke (controller and batteries are both working fine) I finally stopped prevaricating and opened up the hub motor and it turns out my original theory about something going wrong in the motor was correct. The...

thanks d8veh, I will hopefully get a chance to look at them tomorrow. For clarification do you mean that the 15a (which are for electric bikes) batteries should be able to handle 20a? Thanks also to flecc for the explanation of what amps actually are.

Hey just had a quick thought while measuring my current 12V 15ah batteries (and discovering the replacement 12V 20ah I was planning to get dont bleedin well fit the case!). If I were to simply replace the current 3x12v15ah battery set up with the same but perform the shunt mod would the motor be...

Thanks NRG & d8veh, I think you are right, the 1st step being to get a working set of 12V 20ah batteries (that is actually the problem which stopped me using the bike, on the hill suddenly all the pulling power went and when I got to the flat there was almost no pulling power, barely enough to...

If I were to use the shunt mod to increase the power the motor can draw would it be necessary to use a new controller or would the current one work (currently working with 12v 15ah sla batteries)? What would be the effect of the drop of voltage under load? Would you consider it more worth while...

Increasing the voltage with your current controller will make the bike go faster but only if the controller can handle the extra volts. It wont necessarily make it climb hills much better. You could try and solder the shunt in your existing controller in the first place to see if that helps on...

Hi guys, I have had a defunct euro 6 speed in the shed for about 6 months waiting for a diagnosis and repair but before I started on that I was hoping for some advice from the more knowledgable members about upgrading. The root of the problem is that my daily ride to work...