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John, thanks for the pointer on where I might find some KU diagrams. Dave, thanks for all the effort you've put into checking your own controllers. I'll work carefully through your comments with a magnifying glass and meter on my controller board, then report back on here with whether...

Thanks for the reply John. I had found that web page with my Google search, and found it to be the most informative so far on the KU63. So may photos and diagrams, and the chap had even explained all the mods possible. Unfortunately though, none of the photos showed clearly where the...

I'm trying to figure out some of the external lead connections on what I believe is a KU63 controller. When I upgraded one of my bikes to a BMS sinewave controller last Summer, I cut the leads off the original square wave KU controller. I know it sounds stupid now, but the reason was that the...

I can understand the concern about not wanting to lose a £200 battery pack through a split pannier bag ! I'm a real worrier about that sort of thing, so I took a number of steps to make sure it can't happen. Although small, the pannier bags are made from quite thick material and have a...

True, but then again there's a big unladen weight difference between push bikes and motor bikes, say 20kg against 150kg average. Not sure I'd like to ride very far with someone sitting side saddle on my push bike rear carrier, though I agree you do see it being done ! :) 50 years ago I road...

It's a very neat looking arrangement but I'd prefer to get the centre of gravity down, either side of the wheel, rather than all above it. My first lithium battery bike kit came with a neat alluminium cased 36v 10ah pack which locked into a purpose designed rack on that bike. As good...

I just tried it Dave, 36v Lithium in series with a 12 sla, it showed as 54v on the panel, but no joy, not a flicker from the motor. Sorry to have hijacked your thread Mike, I'll stop confusing it with any more posts about my problem.

Sorry Dave, my post overlapped your reply. Sounds like a good idea ! I'll give it a try and report back...

Second thoughts again..... :rolleyes: Maybe I'm just clutching at straws again. I just checked the Conhismotor website for my controller/control panel's page and on there they just state it as 36v 750w, no mention of it being switchable 24/36, which their PDF operating manual states. It's...

Sorry to partially hijack your thread Mike, but your theory on minimum battery voltage has given me food for thought with my controller problem. It's not the same controller as yours, but it does have an associated LCD control panel which enables it to run on 36v or 24v, presumably through...

I think that's it, in a nutshell Dave. As you say, the big controller has the red/yellow pair, whereas the small controller presumably monitors the blue wire back from the LCD to serve the same purpose. It adds suspicion in my mind that the large controller and the LCD weren't originally...

Dave's answer is the result that I'm getting. The blue wire from the LCD panel goes up to 41v when the panel is switched on, so it's trying to send it back to the controller. When the blue is disconnected, it leaves 41v on the panel wire, and nothing on the wire to the controller. On the MXUS...

Here's the photos of the inside of the two controllers. The blue wire from the LCD panel on the MXUS controller is connected to VCC on the board, and brings 41v back to it from the LCD panel. (When disconnected at the 5 wire connector, there's 41v on the panel end, and zero on the controller...

I do have a Conhismotor PDF with all the instructions for the LCD panel, but I can't find a link to it on the web. I thought someone on this board had given me the link in a previous reply to me, but I've searched and I still can't find it. Conhismotor did send me the PDF file direct, and I...

Thanks for the suggestion Trex. I've rummaged around in my parts box and found two 20k resistors, so I tried those in parallel across the blue and black, but no response from the motor still. :(

Thanks for the reply Dave. I've now been out to the garage and tested the voltages you mentioned, and also tried an interesting experiment ! Yes, when the panel is powered up, I get 4.5 volts on the red wires of the throttle and the pas connector. I then had a thought, the Conhismotor...

Smee again.... :rolleyes: A few months back I bought a Conhismotor controller with the LCD panel with 5 levels of PAS. I couldn't get it to work, and despite a lot of help from people on here and Dave's kind assistance in also checking it for me, it still wouldn't spin the motor, so it...

This might be a red herring, but is the blurring caused by some of the youtube conversions from PAL to NTSC ? I read somewhere that if video is converted from PAL at 25fps and then converted to NTSC at 30fps, most of the frames are then interpolated, causing the blurriness. (Maybe it was the...

I always fit a mirror to my bikes, usually a 3" diameter alloy handlebar end mirror. I usually get them via ebay, at about £5 each. They're a nice compromise between weight and durability compared to the average plastic cycle offering, which tends to last about 1 year before snapping off or...

Dohh !! :o Quite right Mike, God knows how I missed the word "pad". I was just thinking blindly about the disc rotors.