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  1. Chalo

    Looking for hub motor for regen purposes

    All you need is 3-4mm of flatted washer inboard of the dropouts on each side to make a 135mm hub into a 142mm hub. There's no magic at work here. Just add a couple of washers.
  2. Chalo

    Looking for hub motor for regen purposes

    If you have Magura MT5 calipers and 8 inch rotors, then if you aren't getting as much braking as you need, you have contaminated pads or just super crappy aftermarket pads. Even one drop of oil can permanently ruin a pair of disc brake pads. You can't bring them back, so don't try. The pads...
  3. Chalo

    Looking for hub motor for regen purposes

    Doin it rong. You will not reduce total maintenance by using a non-brake as a brake, but you will dramatically reduce the real performance of your brakes.
  4. Chalo

    Looking for hub motor for regen purposes

    Leaf 1000W <— Yescomusa Voilamart My thinking is that the extra weight and overhead of operational parts will outweigh whatever trifling energy recovery you get. Better to upgrade your actual brakes than use a non-brake as a brake. If you're stuck on the latter, maybe a short length of...
  5. Chalo

    Power shortage

    If a battery pack can't withstand full throttle all the time, it's not fit for purpose. Just like a motor that can't withstand full throttle all the time (at reasonable RPM) is also not fit for purpose. If anybody learns anything useful about e-bikes from me, let it be this: the controller...
  6. Chalo

    One rad fool

    If you put 5V on the red throttle wire, GND (0V) on the black wire, and then use a voltmeter between black and signal (usually green or white), you should see a sweep between roughly 0.5V and roughly 4.5V as you work the throttle. If you can measure that, the throttle works. By Hall sensor...
  7. Chalo

    One rad fool

    My impression so far is that error 30 is comms. For my bikes, that's pretty much only either Hall sensors or throttle. A battery would not have any way to trip that error unless it uses some sort of hardware handshake that the controller requires.
  8. Chalo

    Power shortage

    We don't know that, actually. I've seen cheap Chinese junk use 18650 cells that were labeled 500mAh or less, and weighed accordingly. 1500 mAh is a very common rating for 18650 cells in consumer crap, and there are many levels down from there.
  9. Chalo

    Power shortage

    When Chinese battery hustlers claim unlikely capacities and specify them in mAh, you can bet that they're summing up all the cells by mAh without regard to whether they're series or parallel. So let's assume 2200 mAh per cell, which is common for generic Chinese 18650. 38Ah/14S = about 2.7Ah...
  10. Chalo

    Bolt-On vs OEM Motor Pedal-Assist... is it comparable?

    They're nothing so good about Bosch or Shimano as to sign up for their abusive and extortionate service and replacement parts terms. Be warned-- both those systems are traps to bleed off as much money as you can stand to lose. Don't fall for it.
  11. Chalo

    Got A Damaged Biktrix Juggernaut Classic ST on my Hands.

    My guess is that your problems are primarily due to a lack of competent initial setup. That's why a bike in a box is cheaper than one on the showroom floor at a decent bike shop-- the one you get straight from the tiny hands of Chinese orphan slaves isn't finished and often not roadworthy as a...
  12. Chalo

    Changing a class 2 to a class 3

    I had a bike of that brand in my stand a few days ago. The mechanical disc brakes were so bad (not worn out or broken, just crappy) that there wasn't anything I could do to make them work acceptably. I ordered the very cheapest replacement calipers I could get, like $16 full retail per...
  13. Chalo

    Removing speed limit from my ebike

    There are a bunch of controllers that have signal wires that can be connected to restrict speed to one of two levels below full speed. It's an extremely common feature in cheap generic controllers. I have never seen it used to limit a commercial e-bike to a regulatory speed, though I'm sure in...
  14. Chalo

    Bikeon, "cassette drive" torque sensing motor

    Well I hope it finds its most suitable applications. It's a clever system.
  15. Chalo

    Marin judge blocks expanded bike access on Mount Tamalpais

    Have you gotten a load of weekend warrior MTB bros and how they ride on hiking trails? I'm not sure I want that either, and I definitely wouldn't want all the inevitable jackass pickup truck traffic fouling what is otherwise a very nice park. Transportation cyclists mostly tend to be good...
  16. Chalo

    Wheel Building ... This just looks Wrong

    Spokes that aren't straight, because they aren't tight, are a problem. Spokes that aren't straight, because they cross each other or the hub flange under tension, are not a problem. If those spokes weren't interlaced at the second crossing (which is customary and beneficial but not really...
  17. Chalo

    Losing charge when idle

    Cells do self-discharge. Some slowly but some annoyingly quickly (thinking of yesteryear's NiCd batteries, gah). Old or abused lithium cells are more subject to self-discharge than fresh ones. Also, the BMS draws its power from the battery, sometimes only one or two cell groups. Even if the...
  18. Chalo

    Lightweight carbon framed hub-motor build - Goal of 20 lbs or less

    Putting the battery inside the hub is in the running for worst e-bike idea ever. That doesn't keep self-confident noobs from coming back to the idea over and over, though. But it's like integrating a suitcase with your underwear-- it creates problems but doesn't solve any. Also, that's a 9...
  19. Chalo

    KT controller with 52V battery

    The voltage (max 60V) won't be a problem. However in my observation, KT controllers can vary by more than half a volt when connected to the same battery. Each one is consistent but not all of them are very accurate.
  20. Chalo

    Do I need this locking groove to make this work?

    Those headset washer tabs fail more often than not anyway. Don't bother. Use a plain non-tabbed washer or file the tab out of the one you have. Use a plate wrench to hold it in place while you tighten the top nut with a big crescent wrench. When I set up a bike whose steer tube is a little...
  21. Chalo

    L1019 to JST & Bullet plugs?

    You'd think so. You can even start with that assumption. But there's no reason that any of the wire colors have to correspond. Ultimately it's big y/g/b wires to each other in no specific pattern, small y/g/b wires to each other in no specific pattern, red to +5V, black to GND. Maybe you...
  22. Chalo

    Battery to motor connection

    Oh, I just registered that you're talking about the cable directly from the battery. The fact that you have any small wires at all coming out of the battery is a bad sign. It implies that there's some sort of data handshake protocol for the battery to turn on and stay on. Whatever...
  23. Chalo

    Battery to motor connection

    Those are the wires for the Hall sensors that communicate rotor position to the controller. Y/G/B are the Halls for the three phases, red is +5V, black is GND.
  24. Chalo

    Qs 273 3.5t winch build

    Sounds like scooter stuff to me. I'd put it in the other end of a canoe so the bow doesn't rise up too far out of the water.
  25. Chalo

    L1019 to JST & Bullet plugs?

    When I get heating or continuity problems from a motor plug, I swap in Anderson PP75 phase plugs and a JST-SM 5 or 6 pin connector. It isn't elegant, but it never makes me fix it later.
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