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  1. L

    Shaft slightly small for bearings

    I have an outrunner which was making noise, and I think the reason is that the shaft doesn't fit tightly in the bearings. It's a 12mm shaft and the bearings are supposed to have 12mm bores, but it turns out that the fit is not tight. I'm going to try to fill the gap with retaining fluid. Anyone...
  2. L

    How to align outrunner shaft?

    I have an outrunner which I took apart (to diagnose a problem, which turned out to be play between the shaft and bearings; I'll ask about that on a different thread). Before I put it back together I want to make sure the shaft is perfectly straight in the rotor. It slides into a holder which is...
  3. L

    LiFePo4 charge current limits

    My bike has a battery pack with sets of 3 LiFePo4 cells in parallel. Each has 3.8Ah and recommends max charge current of 1C=3.8A. All well and good, I try to charge the bike even slower than that. But I'm interested in running my regen brake as hot as possible, because (at least for now) it's my...
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    Cooling an open motor (statorade useless?)

    Hi all, I'm having some issues with my mid-drive outrunner motor which I think are heat related. After running it hard up a hill (high torque, low airflow) it emitted a little wisp of smoke. I backed off, of course, and things seem OK, and I'll be gentler. But in an ideal world I'd improve its...
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    Motor skipping (and burning out)

    I have a custom made mid-drive bike. When I punch the throttle at low speed, there's a loud popping noise and the motor, I believe, jumps/backfires/skips. After being too casual about this, I discovered smoke coming off of a blackened-looking stator post (sorry if that's the wrong word, the...
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