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  1. Z

    Kawasaki Z125 build

    Thank you! You're right I should get a double nut in place. I maybe need to cut one down since there isn't much thread sticking out. You're also right about the motor power, but my battery is the limiting factor for current draw. Maybe in a few years as batteries get better and cheaper I can...
  2. Z

    Kawasaki Z125 build

    Here's the motor and battery. I'm not sure I understand the question about assembling the motor and hub? They are integrated when you buy it. I think it was this hub motor: http://www.cnqsmotor.com/en/article_read/QS%20Motor%208000W%20273%2050H%20V3%20E-Motorcycle%20Spoke%20Hub%20Motor/264.html...
  3. Z

    Kawasaki Z125 build

    I don't think using a load cell in parallel will work because the brake pedal needs to move significantly for the disc to engage, but the load cell doesn't move much at all. The load cell is identical to this...
  4. Z

    Kawasaki Z125 build

    I used 6061-T6 aluminum. The motor axle and the plug shouldn't be moving relative to each other, so in theory you shouldn't have any wear problems with any material.
  5. Z

    Kawasaki Z125 build

    The braking strength will depend on your batteries. My batteries have a max charge rate of 3A per cell so with 20 cells in parallel I can brake using 60A. That generates a significant amount of braking force and I can usually ride around most of the time with only using the regen brake. I have a...
  6. Z

    Kawasaki Z125 build

    Sorry for lack of response and I'm guessing you figured it out by now. This is my understanding of the current limiting parameters. The "current percent" limits the phase current to some percentage of the controller's max rating. The "battery limit" is a percentage that further limits battery...
  7. Z

    Kawasaki Z125 build

    I haven't noticed any heat problems. The motor gets warm but not really hot. I'm at 72V and the current limit set in the controller is 150A. Usually I do short rides (~10 miles) and don't spend the whole time at full throttle so that probably helps too. I would definitely recommend the 8kW...
  8. Z

    Kawasaki Z125 build

    I'm about 600 miles in at this point and still really enjoying it. No I didn't consider a removable battery and have had no issues charging since I can plug in at work. If I didn't have daily access to that charger then I think I may have considered a removable battery. Generally I am happy...
  9. Z

    Kawasaki Z125 build

    Top speed is around ~60 mph, which is about as fast as you want to go on a bike this size. I've been kind of scared to push the battery too low but I think the range is somewhere around 60 - 70 miles. I haven't run the battery down below around 70v (3.5v/cell) resting voltage yet.
  10. Z

    Kawasaki Z125 build

    Thanks! It was registered before I started this project so I'm just keeping it on the books as a normal Kawasaki Z125.
  11. Z

    Kawasaki Z125 build

    Hello! I just finished up my Kawasaki Z125 conversion and I wanted to share it with yall. This forum was super helpful for ideas and info during the build. Here was my totally stock Z125 Pro (excpe the bar end mirrors). This is a small bike so I decided to go with a hub motor to conserve...
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