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Part way through rebuilding this motor into a 26" rim something didn't feel quite right with it's rotation, kind of as if a nut has tightened inside on the spindle or something. Time to make a special tool and open it up to take a look. Nothing looks out of order but a clean and some new grease...

Will a 250w controller @16a happily run a 500w CST motor ? with either 44v lipo or 36v 10aH bottle battery ?

To get used to handling/charging lipo batteries I decided to buy a singe 2s 7.4v 6aH lipo and join it in series with my 36v li-ion bottle battery which also gives about 6aH before flat. It's all wired up in series and appears to work riding up and down my road with a great speed/power...

I've borrowed another one of d8veh's ideas to secure a seatpost held rear luggage shelf to my non-electric. It's a rear rack I've had laying around for a while and since buying it I have been put off fitting it because of the possible sideways movement with a good few kg's in it. After reading...

What is that trick to charge a single cell with a mobile phone charger, i.e is it as simple as taping the charger+ wire to + and charger- wire to - on that cell only even still connected in the pack? what volts or milliamps should the charger use? and what volt should I take them up to? I have a...

My 36v 10aH li-ion bottle battery has now had aprox 150 charges. I decided to fit the watt meter and see how far I could now get non stop for the 10aH. However after 5aH used I noticed quite a drop in power. I eventually got to 28 miles when the bms shut it off. The last watt meter readings...

I am trying to work out actual battery used by the length of charge time. My watt meter tells me my trip to work, taking it easy cost 2.5ah (for example). My battery is a 36V 10ah bottle battery and my charger is a bmsbattery emc120 stating 42v 2.5amp Am I to assume that my 2.5ah trip should...

With watt meter attached, what is the way to get a controller to it's peak watts if you wanted to do the shunt solder mod in the garage and not go out up a hill after each small bit of solder is added? Can it be done not connected to the bike wheel? I'm sure when I throttle spun my wheel off...

Have been thinking of reducing my overall bike weight. My commute to work uses aprox 3.5ah according to my watt meter. I have an idea of carrying a smaller 36V battery with about 4ah or 5ah for a one way trip but maybe with a higher C rating for about 20amp peak, then I would charge up for the...

Bargain of the day. If you have a PoundstretcherExtra shop near you it's worth checking if they have some alloy rear luggage racks 26"&28" adjustable (black) in stock at just £7.49 (half price usually £14.99). I just got one from ours and it's very solid and easily as good as the £20 ones from...

Thanks to a recent thread on this subject I ordered/received my parts to wire my lights directly to my bike battery as I need to charge the small lights battery pack every day and would like to know if it will run ok without draining my battery too quick. How can I work out how much power...

BBC News - US company reinvents wheel to make bikes electric

I have been advised by someone who used to regularly ride my route to be prepared for punctures regularly from the bushes thorns especially when farmers trim the hedges. The tyres I have on now are called Kenda Happy Medium which appear thin, I have read advice on this forum that Marathon Plus...

Is there a way to tell how much charge is left in my battery with one of those cheap yellow multimeters? How have others been measuring how much watt hours or amps still left in battery before a recharge is required? I have not ridden my new future commute yet and won't be for a few weeks but...

I'm probably going to be cycling in heavy rain at some point and am not convinced my bottle battery is waterproof, I mean even around the led lights at the top, these seem loose and water could easily run into there. Are these batterries more waterproof than they appear? or should I be covering...

Here I was a couple of months ago deciding to start some cycling after having never even sat on a bike for 20ish years, so took on the challenge of building my own ebike from knowing nothing, this includes learning how to and building the rear drive wheel. Thanks to everyone for help and thanks...

I've ordered a 36v10ah bottle battery and the description states 'have to solder own controller wires to discharge port'. So to be ready I best dig out my soldering iron and make some wires up too. What size wire is generally used to the battery and what size bullet shaped sockets are the...

With my rear drive motor in situ on my bike I can see when I assemble the brake disc to the motor, it isn't going to line up with the caliper. Any way around this with some standard part?

I'm more mechanical than electrical so am having to learn about the electrics side of things and have been tinkering on the hub motor ebike.ca simulator. For my 1st build I'm considering overspeccing it for reliability and longevity. So hypothetically if I have a 500w motor running at 100% on...

It looks like I have a new hobby. It all began with me moving house soon, closer to work and give myself the challenge of cycling regularly. The problem is I have not sat on a bike for about 20years, am not overweight but am alot unfitter than I look, so checking out expensive quality racer...