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  1. M

    HELP! Design freewheel and disc brake sprocket adapters ecosystem

    I saw their slection before but the problem is is a 60 tooth costs $77. Not my cup of tea. For comparison, JT sprockets has a 69 tooth rear for only $24 USD. JTR1135.69 The only thing is it's difficult to find in the US due to it fitting a model that I don't believe was released here...
  2. M

    HELP! Design freewheel and disc brake sprocket adapters ecosystem

    after extensive searching the best 420 sprocket I've found seems to be: http://www.jtsprockets.com/catalogue/part/JTR1131/ It's available in upto 65 teeth it has a huge range of options. The largest 428 sprocket I've found at 69 teeth seems to be...
  3. 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...
  4. M

    DIY 0-5k throttle

    Hate to revive such an old thread but this was actually one of the top google results when I was searching for an electric throttle so hopefully this will help someone out. All of the options here are good but there's some new ones now. I just bought a SUR-RON replacement throttle for $36...
  5. 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...
  6. M

    Makita 18V batteries for small kart

    Figured I'd give pictures of the karts, here we are:
  7. 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.
  8. 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...
  9. M

    Makita 18V batteries for small kart

    The makita power tool batteries worked awesome! The kart didn't run out of juice the whole run. I had a razor dune butty with a 8AH 48V pack from china that ran out of juice after like 20 minutes, and the makita powered dune buggy just kept on going. The batteries, about 8AH at 36V (only two...
  10. M

    Makita 18V batteries for small kart

    Ok I briefly tested the kart with just two batteries in series. I think the stock packs are 5s2p. With the stock 300 watt mitor I need to measure the amp draw. I will be using 4 batteries. 5s2p in a 2s2p configuration. I guess that would be similar to: 5s8p? Should handle the amp...
  11. M

    AliExpress battery pack unboxing (for my eZuma project)

    There are fork upgrades for the zuma, I admire your willingness to go big or go home! One future idea for the battery pack problem, order multiple smaller packs. Wouldn't this mitigate the weaknesses you dealt with in the larger pack?
  12. M

    Makita 18V batteries for small kart

    The makita battery packs are just the 18v battery packs for their power tools Just like these: Makita BL1850-2 18-volt LXT Lithium-Ion 5.0Ah Battery, 2-Pack- Discontinued by Manufacturer (Discontinued by Manufacturer) https://www.amazon.com/dp/B00T2YLVXA/ref=cm_sw_r_cp_apa_i_UVFRDbEPRQ1E3 Among...
  13. 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...
  14. 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:
  15. M

    Haibike purchase or Bafang BBS01B DIY

    I have a haibike with a tranzx drive and motor. Some annoying issues. The software is locked. Battery life is diminishing as it ages. No local dealers to see what's going on with the small issues. But, it's seamless with the torque sensor. It is legal, waterproof, all around pretty...
  16. M

    High Voltage on DC motors

    it depends. Brushless, or brushed? what kindof motor, and what kindof controller? obviously some motors will just pull back on assist, like some mid drives with sensors. Likewise, some battery packs will cut out long before the motor gets damaged. Holding watts the same (not always...
  17. M

    Haibike Tranzx Battery Repair

    Got it, just learned how to upload pictures here! Ok Attatched are the pictures, battery can not currently last over 10 miles, used to get up to 40 in lower power settings, or 2-3 out of 4. Was previously possible to last over 20 miles on full assist. I have done 1543 miles since I...
  18. 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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