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Here is a diagram of the black box, if it is of any help for those who may be interested in considering something similar - I think I will go for a Y splitter for discharge and build an additional charger port for the second battery to charge through.

[Bump] Anyone? Anything?

Dear All, My small foldable eBike currently has a very simple 36V 18650 10S2P 7Ah battery with an XT60 discharge and a 2 pin JST charge port. Within the bike casing, there is room for 2 batteries and I was considering what would be the best approach in order to install them potentially. As for...

I have ordered a flywheel and will keep the thread updated.

Dear Nealh, I am more than happy and able to machine out the fins in order to fit a BMS BB. I believe I am at a point in which I have invested a significant amount of time into this bike and I feel as though I would like to make it work, if it were possible somehow

Hi, I understand it is a compact bike, from my judgement, I can see (and hope) that the pedals shouldn’t hit the ground, especially when dis/mounting lowered curbs. I am also potentially considering changing the entire rear hub for one which can accept a freewheel more easily.

I thought my picture captured the threads but I was originally under the impression that there were threads already present - can be felt when running my nail across the ridges. I always assumed any freewheel of that diameter would fit but on second thought, I am beginning to see how that may...

Hello All, I currently own a CityBlitz CB020 operating at 36V 250W. It came with static BMX pegs from factory with no chain. I would like to add a set of pedals and a gear/ chain setup to begin to make it slightly more legal and road worthy (can move on to the pedal assist sensors later). As...

So I'm assuming the solder mount starts from point D going upwards at length 20-30% of distance between B-C or A-D. I shall await your reply.

Thank you for your reply - Can you please show me where the shunt is and which side to solder on to?

Dear All, Upon my not-so-recent purchase of a City Blitz CB020 with a 350W motor @36v, I was wondering if I would be able to alter my board in any way to push more power to the motor? I appreciate I will be limiting my battery life and limiting the lifespan of the motor if I am able to...

Thank you for your very detailed reply with figures and values. As a man of maths and physics, they are very much appreciated. I’d like to start off with the fact that I know rather little about this topic and please do correct me if I am wrong in what I say further. My original dream project...

Thank you for clarifying - I shall consider getting it on the DVLA register with Q plates if I can achieve a nice breezy speed on it! Gotcha with the law, no open parks either I take it. I shall definitely be making a project post in the speed subforum to discuss these plans further.

My apologies for not realising this was illegal as standard - intended for off road use once speed and power are beyond current limits.

There are no pedals nor chain system, only static BMX style pegs.

I shall most definitely be starting a thread to explore the different avenues for which this bike can be maxed out. Thank you for your reply!

Hello All, Having purchased what I believe to be a rare bike in the UK, I would like to upgrade the speed on my CityBlitz CB020 currently operating at 36V 350W. As a car mechanic, I have a fairly good grasp on general electrics and cable running but I have no idea on where to start to gather...