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  1. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    Thanks for your comments Lurkin, I have gone back round with the dremil and a stone bit putting radiuses on the cable routes and deburred wherever possible, there's not really any room at all for an inner tube like you suggested. The only fuse I have currently in an inline automotive fuse...
  2. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    It's been a little while since I've worked on the bike properly, I've been modelling up some of the components and modifications for a full 3d model at the end. Motor Modification I cut the motor wire and soldered up all the connections. To get the bearing to slot over the shaft and the wire...
  3. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    Seatpost Modification I've drilled the seatpost for the cable routing between the saddle case and the frame. I've found there is nearly no room at all in the frame at the seatpost for connectors, especially since 21 wires have to be connected there. I think this means I'm going to have to...
  4. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @motomech. Ah I think i got a little confused. That's good to know between the C and the H. My only reasoning for the H is that it has a threat to put a single gear freewheel on instead of using my modified on for a cleaner look, I'll stick with the C then. @lewtwo, it's not the easiest thing...
  5. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @Mündawg Thanks! @Motomech Ah, I just saw the bafang motors that do that. The shaft that I have drilled is the only external non rotating part. If you see the photos the next part has the screws for the brake rotor on. Good to know about the saddles, I'm designing it bespoke for my charge...
  6. LawrenceEaden

    Q100 and Q100C internals

    @Motomech. Great Info! I'm slightly concerned that the drawing of the Q100H motor on the BMSB website is wider that the Q100C (mine). It would be so handy to get the q100h and swap them out.
  7. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @chas58 I think I'm going to get another motor. I'm trying to find a Q100C without the freehub to swap the internals into my Q100C CST. This would mean I can get one with 36 spoke holes because i won't be using the shell, also I can then use a single gear freewheel instead of my chopped down...
  8. LawrenceEaden

    Q100 and Q100C internals

    @d8veh I've just had to take mine apart because it has lost drive. Did I read it correctly when you said the cores are interchangeable? If I got a Q100 motor it would fit in the Q100C Shell?
  9. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @Lurkin I saw that a little bit. I'd prefer any control system to be arduino based if I was going into microcontrollers for the easiest integration with other systems I might add to the bike. @chas58 Thanks. Why would it need an LCD screen? from what I read there is a signal wire which outputs...
  10. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    I saw some of the tools for helping with the nipples, but it didn't take long to do just the one wheel, quite relaxing. and using the nipple as the tool is free... @chas58 I tried to find a freewheel q100 but I couldn't anywhere that had 32 spoke holes, the only one I found by going through...
  11. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    Controller Simplification I managed to find another supplier of this controller, the YK85S (different to the YK85), to request an electrical diagram and got the following back. This let me cut back and insulate all the wires I don't need, everything but the key switch, battery, motor, motor...
  12. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    It lives! I got the motor to turn. I went all round the board with the multimeter and made a guess that there was a 36v ignition switch, which was wired differently to other YK85 controllers I had seen online. I'll post my full diagnostic results later about what I believe all the pins do for...
  13. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    I just did lots of testing and I think I've got it sorted. Further updates tomorrow. @LeoTwo I've read through that, my wires are different colours and it actually is wired differently.
  14. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @d8veh you're right. I've put wiring in along my battery pack in the seat tube to fit a PAS sensor in the future. It would be good to calculate the mechanical resistance of the motor and map automated pedal assist to make it ride like a regular bike when off the throttle. @motomech. I forgot...
  15. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @mrdude_1 I like your thinking. I'm going to wait and see if i need the room for the connectors. if it's not full sardines I may make a smaller one. @d8veh the ally case makes the footprint so much larger in all directions, i want to keep the bag as small as possible. The PAS will be the next...
  16. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    I always use a D Lock. Whenever I've used anything else and left a bike locked up on the street anywhere in London it's disappeared. (I learned after the second time). I'm hoping the key ignition will add some security as well over just a on/off switch. Frame Bag Mock Up I picked up the...
  17. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @LewTwo That's a great idea! I'll try and cut the patterns out to leave myself enough left to do that. @Jimbo7890 Thanks! I'm planning to do my own FEA on a model of the frame with the cuts, but stress concentration isn't something I'd considered, really great info to read, thanks. I'm...
  18. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    Yes that's the kind of key switch i'm going to get. I'm trying to find a nice metal one. I was considering the controller heat sync and thought why not just modify the casing it came in. One side already has the holes to screw into the metal block the FETs are mounted to, so it's ideal and a...
  19. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @i2000 Kinda. I'm going to put some 1mm plastic on each face of the bag to fix components to. Still yet to be fully resolved the easiest way to do this and keep the bag accessible and be able to take it off if I need to. The controller has an ignition switch wire on, so the switch won't be...
  20. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @LeoTwo Thanks for the advice. I'm looking at a few different reinforcement options. Ha, i'm yet to decide what the final colour scheme will be yet. Frame Modifications - Second Head Tube Hole I got some carbide die cutter bits this week to make the second head tube hole a bit easier than the...
  21. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    Battery Reinforcement I managed to pick up some 25mm conduit from screwfix for about a quid for 2m. It has a OD just smaller than the ID of the frame tubes. I cut down it's length using about a 160 section per pack. I added some a few more wires down the pack as redundancy incase i wanted...
  22. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @MrDude_1 That does sound cool! I like the idea of wherever it is getting good air flow when travelling at full throttle. @LewTwo That looks mad good. It could easily fit in a tidy frame bag. I got this controller though to learn how it works and try and develop my own for extra functionality...
  23. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    Thanks for all the feedback guys, really useful! I've done a drawing of the internal layouts for the frame and frame bag for the controller. I'd quite like it to be a nice polished product at the end so I'm going to have my controller and bms in a bespoke leather bag I'll make to the design...
  24. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    @motomech That's cool! I'm not an innovator, but it felt like a challenge worth trying! I have seen the dishing problem when calculating the spoke lengths. The motor I have ordered is wider than my drop outs, so I'm going to look at a few different options that I'll post about when it's here...
  25. LawrenceEaden

    Single Gear Stealth Build - Battery in Frame Tubes

    Hi All. I'm a little way into my build now and I thought I would share my experiences. My main goal for the project is to build an eBike that doesn't look like one. I recently got a single gear bike to try because i like the aesthetic and simplicity. A bike like this has a compromise with the...
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