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  1. M

    HELP! Design freewheel and disc brake sprocket adapters ecosystem

    I need information primarily on: sprockets freewheels sprocket freewheel adapters This is primarily for my son's MX650 razor, but I can see it being of use for others as well. I'll let you guys know if it works but there's a JT sprocket with an 80mm bolt circle pattern that is only about 1mm...
  2. M

    Haibike / Transx battery serial logic analyzer

    So guys, I have read about the battery problems before. It sucks that some parts of the Ebike are very robust, but the batteries lack long term support, rendering some e bikes useless, and inevitably headed for the dump. Unless we do something about it. I still don't know what I'm doing...
  3. M

    Razor kart upgrader

    So far the attached is what I've got, I've just overvolted the stuff. Looking for more! The dune buggy looks like it'll take an brushless my1020 just fine the drifter, not so much.
  4. M

    Good motors for Karts, Stand up scooters, misc EV's other than bicycles

    I'm considering the Brushless MY1020 motor but I want some room for expansion. I'd like a thinner motor, and something that can take 72 or more volts, I've currently invested in 48V packs so 96V would be awesome but if not I'll get 36V packs. Below the motor pictures is a picture of a 3000...
  5. M

    Makita 18V batteries for small kart

    I have two razor karts we're going to ride around on haloween dressed as mario kart characters. I've ordered chinese battery packs (I actually have good experience with these, although not this particular seller) but they will not be here in time I'm afraid. I have 4 makita batteries. Two...
  6. M

    Currie electro drive battery connector, can someone measure this for me?

    I have another brand of battery from a haibike urban plus. I think it's different. Some curie bikes used the same mid drive and I think battery manufacturer, I'd like someone, if they have this bike, to measure the termial spacing and thickness if possible, thanks guys! Here's a pic:
  7. M

    Haibike Tranzx Battery Repair

    Hey guys & gals, so I have a 2018 Haibike Urban Plus, the one with the 500 watt mid drive motor, it's all and all a decent bike, but recently the battery life cut to less than half of what it should be. I run out of power on my ride home, the battery used to be good for 3 round trips, and I...
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