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  1. ChubbyQuark

    wr250f conversion

    Looks like a great build, did you mange to maintain it as road legal? I'm trying to do a similar thing in the UK but lots or red tape to get through.
  2. ChubbyQuark

    Cromotor build - lurching motor

    I managed a longer test ride today and re-checked the volt drop. The drop is around 1-1.5V without load, this is tested with the wheel at rest and then applying 1/3 throttle. Strangely the pulsing noise that can be heard here doesn't correlate with the colt drop. Motor Noise I've not tested...
  3. ChubbyQuark

    Cromotor build - lurching motor

    Hmm, that battery is new, bought from Wallen power, specs below. I thought this would give enough power to the system but I was a bit too keen to get the system running and probably didn't do enough battery research. Can the cycle analyst v3 be programmed to override the default controller...
  4. ChubbyQuark

    Greyborg frame - Rear brake adapter wanted

    Yes, that's the part. Neat solution with the torque arm and brake mounting on one piece. I'll see if I can reverse engineer Kiwi's design unless anyone has a spare they are willing to sell. Thanks for the info.
  5. ChubbyQuark

    Greyborg frame - Rear brake adapter wanted

    Building up a project started a few years ago and I need to add a rear bike to my Greyborg frame, I'm after a rear brake caliper mount, no idea where to get one, so if anyone has one surplus to requirements, let me know. Thanks! Image of the part below, I think it's two pieces, a mounting...
  6. ChubbyQuark

    Cromotor build - lurching motor

    Great info. thanks amberwolf. The power doesn't completely go, more like a dead spot every revolution or two. Would an updated controller be beneficial? Conscious the ones I'm using are quite old, I inherited them when I started the build a few years ago, I'm sure things have moved on quite a...
  7. ChubbyQuark

    Cromotor build - lurching motor

    So while trying to figure out the best way to get a watt meter on the bike I did a quick test: Took the voltage across the ignition switch at rest which measures 80.9 (72V battery, freshly charged), pulsing the throttle (half throttle) with the wheel off the ground the voltage was dropping to 78.2V
  8. ChubbyQuark

    Cromotor build - lurching motor

    Hmm, just looking at those but they are only rated up to 60V. Looks like one with an external shunt or the cycle analyst V3 is the way to go?
  9. ChubbyQuark

    Cromotor build - lurching motor

    OK, will do some tests tomorrow. Looking at some other threads do I need to check for voltage drop when throttling along with current draw? Edit: looks like a watt meter, as you suggested, is the way to go for this.
  10. ChubbyQuark

    Cromotor build - lurching motor

    Video clip attached. Just noticed the flat spot on the tyre from where it's been standing so long! When the motor gets to half speed the noise decreases and the pull is more consistent. Motor Noise
  11. ChubbyQuark

    Cromotor build - lurching motor

    OK, thanks. I have a multimeter already but will research the watt meter and various tests I need to do. I was going to ask about the cycle analyst as this also seems to be a good, albeit pricey, way to set power profiles. I'll try and post a short video of the issue as the accomponying noise...
  12. ChubbyQuark

    Cromotor build - lurching motor

    Great, thanks for the software. Do you know if the USB cables are available anywhere? Assuming I can program the controller, could it be set to match the output of the battery, I dont need/want the full power of the motor (this project was started when i was after a different build) so would be...
  13. ChubbyQuark

    Cromotor build - lurching motor

    Hi everyone, First post here but long time learner from the great knowledge available. I've searched other threads but can't find any symptons that match what is described below. This build started about 6 years ago, with the following components: Cromotor (I believe it's a v3) Battery -...
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