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ViolaMart rear hub wheel problem

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    ViolaMart rear hub wheel problem

    I have heard about several others who have had the same problem with a Violamart 1000w rear hub motor. I have two of these, one is currently running beautifully in my Burley tandem bike. The other has never worked.
    When attached to either controller (the new one and the one on my tandem) all it will do is judder. It once spun slowly, but then went back to just wobbling back and forth. The new controller works fine when attached to the tandem motor.
    I bought an ebike teste, ran all the tests, and they were all good. I then took the motor apart and checked all the wires for continuity from the plugs to the hall sensors and the primary wires. Everything was fine.
    I am suspicious of the connectors, esp the big block that connects the rear wheel to the controller. I think the next thing to do is cut the connector off and solder all the wires to eliminate any possibilty of a bad connection.
    Any thoughts?

    I think you are on the right track. I already had to solder up the corroded wiring on my trailer connector. It's just basic electrical maintenance. Although Im in winter salt territory, so we do have more outdoor wiring issues. But just the stress of unplugging wiring wears out wire connections anywhere you live. Make sure you have heat shrink tubing at the ready as you redo your connections. You can also goo up the heat shrink with silicone to further water proof your cable. And if you use Neutral Cure silicone, you wont have silicone acids corroding the connection you just renovated.

    I already got me a tube and it has no smell at all. Unlike all the other silicone caulks that smell like vinegar. Its still good for most every silicone usage, so I'll probably use this for windows and bath too. So it won't go to waste.
    Last edited by stts; 12-13-2022, 07:17 PM.


      This question was posed a few months back, and I have finally gotten around to the repair. I back-burnered it because I have been working on a mid-drive tandem conversion that has worked out great!

      I soldered every connection coming out of the motor to the matching controller wire. It works! There was obviously a bad connection in the wheel side connector. I took a ride around for a bit today and it works like it should. I might install plugs again, since it is inconvenient to have the motor and controller hard wired. But maybe not?


      • stts
        stts commented
        Editing a comment
        Congrats on finally getting to the bottom of your bad motor problem. That is 3/4s of the work right there. In time though, you will eventually have a flat or other reason that requires the wheel removal. Then that heavy wheel will be jerking hard on the wiring that's all soldered up. So it's best to put a new connector on so you can easily disconnect the motor. The wire bend at the hollow axle is a nasty trouble spot that could go bad on you if the wires were stressed in future repairs. But you can do it at your leasure, to research a quality connector and give the motor a good workout, since you have a working bike with a good solder job. Ebike stuff from Aliexpress often takes a month or so in shipping time.
        Last edited by stts; 02-02-2023, 07:03 PM.

      • Retrorockit
        Retrorockit commented
        Editing a comment
        If you want to stay hardwired I would suggest a Tannus Armor tire liner, and some sealant in the rear tire. may be you won't have to ever break it down by the side of the road (or wherever you ride).