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    Hub motor axle removal

    Just to clarify there's clearly a bushing machine welded onto the hub. That bushing is fixed, but it seems the axle may be pressed into that bushing. On one side (2nd pic) the axle clearly looks removable (c clip, key, small gap where it meets the bushing) but on the other side it almost looks...
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    Hub motor axle removal

    I've got a cheap Chinese mfg'd hub motor (approx 750w) that I'm trying to salvage, which came out of a Wave brand ebike. Someone cut the axle to remove it. I plan to either attempt a repair or cut a new one on my lathe but im having difficulty removing it and I'm wondering if anyone is familiar...
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    YK31A Modifications 60v+ high current

    Thanks for the image tips & all the feedback! (Images should be fixed in the original post) It looks like Vds(max) is 75v on the IRFB7730, so even 60v is probably too much. That FET came out of a Ryobi 40v(36v) battery, which further supports your suggested 50% safety margin. Looks like I'll...
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    YK31A Modifications 60v+ high current

    Im attempting to modify a cheap YK31A 24v 500W DC speed controller for use with 60v (or more) on a larger DC motor. I believe I have a handle on the necessary tasks: Here is the PCB in question: Tentative Plan 1) Beef up the traces: Batt->FET->Motor I will add heavy solder + overlaid...
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    Troubleshooting shorted throttle controller

    Wow thanks for all the excellent responses. I've never ridden the bike, this repair is pro-bono work for an older guy on fixed income and it's his only mode of transportation. So I'm working on almost zero budget.... And quickly getting in over my head. But this gives me a couple of...
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    Troubleshooting shorted throttle controller

    So I'm referring to the display mounted on the handlebars not the motor controller. The 5 conductor wire was severed right at the display box & I believe the data line(s) were shorted to the +V. I fixed the severed wire using a 5pin JST connector & some cat5 cable soldered to the board of...
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    Troubleshooting shorted throttle controller

    I'm attempting to troubleshoot a shorted throttle controller cable. The throttle unit was severed and I believe one of the data lines was shorted to +. The bike is a Wave 1.0, the controller is marked KT-LCD800 link: http://www.szktdz.com/upload/file/20140724/20140724012355_80760.pdf Amazon...
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