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  1. kurtster

    Swapping Bafang M400 with more powerful model?

    I'm eyeing a used e-bike that comes with a Bafang M400 motor (250W). Does anyone know if more powerful Banfang mid-drives such as the M600 or M610 have similar dimensions that would allow them to be installed in the same space? Cheers, Kurt
  2. kurtster

    Hidden Wire Brake Sensor always on

    I've got a problem with the BMS Battery-supplied "hidden wire brake sensor", which I connected over the weekend to their S12S controller. For some reason it's always on, regardless if the brake is pulled or not. I tried reversing it (LED facing up) but no dice. Even with no brake cable passing...
  3. kurtster

    Top speed of derestricted 24V assist ebike?

    After riding my Q128c build, my brother-in-law has been inspired to upgrade his assist-style e-bike with a simple kit he found online. His bike is the common (read: legal) "assist" type -- a 24V mid-drive system that has a sophisticated PAS (torque + cadence). In such assist bikes, the motor...
  4. kurtster

    Possible to change freehub of Q128C?

    I'm thinking of installing my currently unused Q128C hub in my wife's bike, but looks like there might be a complication due to larger freehub. Therefore, I'd like to know whether it's possible to remove the Q128C's freehub and swap it with the smaller one that's on the stock wheel. Both are...
  5. kurtster

    Q128C motor not spinning freely

    My shiny new Q128C motor, built in a 20-inch wheel, arrived a few days ago from BMS Battery, but still waiting for the battery which I ordered from another vendor. In the meantime, after placing the wheel in the dropouts, I noticed that it doesn't spin freely by hand, in fact there's a LOT of...
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