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    Motor grinding noise, loss of power, wiggle in the rotor/motor shaft

    I bought this Luna BBS02 last October and have put about 1600 miles on it.

    During my usual commute I suddenly had a lot of vibration and noise and lack of power, the motor would still respond normal to throttle and PAS. When peddling with the motor off there was a lot of drag and it was much harder than usual. I took apart the motor and found one corner of the magnets chipped and there was some small metal debris in the motor. The bearing is firmly attached to the motor shaft. There is also a small divot in the housing for the bearing, not sure if that is supposed to be there as this is my first tear down. When I got down to the motor core, there was some side to side wiggle and the magnets were sticking to one side or the other and I could not spin the motor freely without some friction. I have taken the motor shaft out and in a few times and am not sure if it is seated well.

    Nylon gear in good shape.

    Questions-

    Is the motor core supposed to spin smoothly when one has it open, or is it normal for the magnets to stick to one side or the other and for they to be "play" from side to side? Does this go away when the shaft is engaged on the other bearing past the nylon gear?

    Thoughts on the damaged magnet?

    When inspecting the nylon gear, I noticed that there is some slippage between it and the pinion gear, is this normal? The type of bearing inside the nylon gear makes me think that it is.

    General direction to go from here.


    Thank You,

    Orrie
    Attached Files

    Comment


    • Orrie
      Orrie commented
      Editing a comment
      HIGHVOLTAGE, thank you for the response, I am familiar with that vibration at top speeds, around the 28-32 mph range for my bike, but this is different and happening at low speeds.

      paxtana - I think when I am saying loss of power I mean more slipping. I will see what the nylon gear looks like again this week compared to the new one I have coming and see if that is the issue. I also noticed when I had the motor apart yesterday that if I spun the axle, turning the large gear and the pinon gear and held the nylon gear with my finger, it would slip and the pinion would keep spinning with very little effort. Is that how it should be?

    • paxtana
      paxtana commented
      Editing a comment
      Hmm..you are welcome to send a vid so we can have a closer look..maybe shoot a video of this, upload to Streamable and send us the link

    • Orrie
      Orrie commented
      Editing a comment
      So I rode home from work yesterday and at first it was the same problem of vibrating and slipping, but then I felt something catch in the motor and it was back to normal, this happened again briefly during the ride and it seems always to be related to starting off slow when the motor has to work hard for those first few cranks to get up to speed. I made sure the rest of the way to take a few extra peddle strokes to get moving a bit before allowing the motor to start and keeping the gear low at first to keep the rpm high, and this seemed to keep the slipping and vibrating from happening. Ill be taking it apart again in the next week or so and will inspect the gears and send video of anything suspicious. Thanks again

    I just purchased a 2018 Cannondale Cujo 2, which can still be returned for a full refund. It has an external bearing BB (FSA MegaExo Boost). Can I install the cyclone motor on this bike? Thanks.

    Comment


    • HIGHVOLTAGE
      HIGHVOLTAGE commented
      Editing a comment
      Cyclone support is very limited here. They don't follow the same standards as BBSHD and BBS02 kits. If you don't have any experience with installing Cyclones already, I would not recommend starting with this motor. It's a very DIY motor and you can technically get it to work with anything with enough skillsets and tools.

    • paxtana
      paxtana commented
      Editing a comment
      Check this thread for fitment measurements but what Highvoltage said is also true, it requires a fair amount of reading and fine tuning to do cyclone builds
      https://electricbike.com/forum/forum...-documentation

    I have a BBS02 with a Bling Ring 42 front sprocket and a rear Alfine 8 speed internal gear hub with electronic shifters.
    I installed a single speed chain, which seems much more robust than the 10-speed chains which break quite often.
    The single speed chain is a little noisy. Is there a different sprocket I could use to be more compatible with the single speed chain?

    Comment


    • danbaron
      danbaron commented
      Editing a comment
      The noise has to do with the single speed chain having a wider opening than the sprocket tooth size, so the chain slides a bit on the teeth. It's not bad. I assume one is supposed to use a single speed sprocket with thicker teeth.

    • paxtana
      paxtana commented
      Editing a comment
      Single speed chains will be noisy with any narrow/wide chainring.

    • xcnick
      xcnick commented
      Editing a comment
      video about narrow wide wear: https://www.youtube.com/watch?v=TzqZxtW4xJk

    I need to order Parts for Bafang Ultra 1000;
    ! each:
    Freewheel clutch
    cardboard gasket for gearcase
    Motor side gasket

    Can I get these thru Luna?

    Comment


    • HIGHVOLTAGE
      HIGHVOLTAGE commented
      Editing a comment
      Was the Bafang Ultra purchased from us? If so, email support@lunacycle.com with your order # and request.

      If not, then unfortunately we cannot sell these parts on their own due to limited supply. Sorry.

    Originally posted by nlhaines View Post
    I just purchased a 2018 Cannondale Cujo 2, which can still be returned for a full refund. It has an external bearing BB (FSA MegaExo Boost). Can I install the cyclone motor on this bike? Thanks.
    I have some experience and have taken on some tough projects before, but I am no machinist. Would the BBSHD kit fit my bicycle? If so, I may go that route. Thanks.

    Comment


    Hello,

    can someone tell me the value of the coil resistance of a BBS 03 HD. I have ordered a new controller and motor isn't running. Just a short shock then nothing any more till power off/on.

    Best regards from Germany
    Christian

    Comment


    • HIGHVOLTAGE
      HIGHVOLTAGE commented
      Editing a comment
      The coil resistance? I don't think anyone has that answer unfortunately. Tell us more about the short shork? What are the details?

    Hi,

    first of all i must apologize for my bad english :-( This summer my BBS3 HD got burned after a working time of around 1 year. All mosfets were gone. So i ordered a new controller from Luna. After installing nothing happens either. So i ordered a display DPC18. Today i installed that and yes, it powers on. But the motor doesn't turned and Error 8 was displayed. So i disassembled the whole engine and cleaned the connections. After assembling everything the display powered one but only does a short shock. I can power it with my thumbgas but still only one short shock. The display shows power consumption but nothing happens. The controller heats up a little bit. After power off/on i can shock it again one time.

    Coil resistance of my motor is 3-4 Ohm on all windings.

    Comment


    • HIGHVOLTAGE
      HIGHVOLTAGE commented
      Editing a comment
      Considering you've replaced the display & controller already. I would wager to say that it's your motor core that has a short circuit somewhere in it and needs to be replaced.

      Either that or your main wiring harness. Start with a replacement harness first since it's cheaper.

    I just received my Sur-Ron and it won't go above 7mph in either Sport or Eco mode. What can I do to troubleshoot? The battery is at 100%. I also have a spare battery I tried and same issue. Thanks, Rich
    Order # 60746


    *EDIT* I may have figured it out. Is this wire supposed to be cut? It came cut for some reason:

    Click image for larger version

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    Last edited by roadrich; 09-05-2018, 12:06 PM.

    Comment


    • HIGHVOLTAGE
      HIGHVOLTAGE commented
      Editing a comment
      Yes, that is the source of the issue. Some of the recent batches came with a street legal setup for whatever reason. You can just re-attach those wires back and cover it with electrical tape and you should be good to go.

    How do you re attach them

    Comment


    • HIGHVOLTAGE
      HIGHVOLTAGE commented
      Editing a comment
      Well just like any other wire. You can either crimp them together or use a solder sleeve.. Or you can just use some flux and solder the old fashioned way.

      https://www.youtube.com/watch?v=i5LBf19MqPk

      https://lunacycle.com/luna-solder-sleeve-variety-pack/

      If this seems too intimidating, try contacting an electrical hardware store or a hobby shop that sells R/C cars or drones. They'll be able to do this for you easily.
      Last edited by HIGHVOLTAGE; 09-05-2018, 12:41 PM.

    • paxtana
      paxtana commented
      Editing a comment
      Some folks are just twisting the wires together. Should be fine either way. We can send you a WAGO connector if you want to let us know your order#. Stick stripped ends into the connector, press down on the lever and it's connected.

    • roadrich
      roadrich commented
      Editing a comment
      I soldered mine and put shrink tube over it. Worked like a charm: https://photos.app.goo.gl/QoUqPrp9yqHxTk6M6

    I have a Steintrike and need to know which bottom bracket I have.

    Comment


      This is so I can order the right Cyclone 3000watt kit.

      Comment


        Hello Lawrence,


        I don't think it is any of those - I think it is a Hollowtech II type BB.

        Regards,


        -Ethan

        Steintrikes NA

        Wildfire HPV, LLC


        On 9/2/18 10:23 AM, Lawrence Rhodes wrote:

        Dear Ethan,

        These are the choices for the mid drive. I suspect it is the Standard Square tapered BB. I hope your Bottom bracket(BB) is here if it is something else. Sincerely, Lawrence


        Standard Square Tapered BB 68-83mm

        Standard Square Tapered BB - 83-110mm
        Standard Square Tapered BB - 120mm
        ISIS BB 68-73mm $35.00
        ISIS BB 83mm $35.00
        ISIS BB 100mm $35.00
        ISIS BB120mm $35.00


        From: Ethan Davis <recumbo@roadrunner.com>
        To: Lawrence Rhodes <primobassoon@sbcglobal.net>
        Sent: Friday, August 31, 2018 5:43 PM
        Subject: Re: Fwd: contact from Steintrikes.com
        Hello Lawrence,
        It is an English thread, 68 mm bottom bracket shell. The chain length is determined by the boom (pedal) position, but it generally would be 3 and a half or so standard length chains.
        If you don't mind my asking, who did you get the Explorer from, and where are you located (just for future reference, if potential customers ask for nearby owners of Steintrikes).

        Regards,
        -Ethan
        Steintrikes NA
        Wildfire HPV, LLC






        Comment


          Have I given enough clues as to which kit to purchase? Thanks for the help.

          Comment


          • paxtana
            paxtana commented
            Editing a comment
            You can use either square taper 68-83 or isis 68-73. Pretty much the same thing but isis has slightly better tolerances.

          Just for future reference, try to keep your posts to a minimum if you can. If you have more to add/say, you can either comment on your first post, or edit it out. Don't worry, we'll still see it and try to answer. It just helps keep the clutter in the thread down and keeps it organised and easy to read for us. Thank you.

          Comment


            hello
            my rear wheel got stolen and i just put the new one on. i rode for about 10-12 miles while the display screen was in error e 21 for speed sensor abnormality. i put the new magnet on and noticed the sensor was not lighting up. i disconnected all the connections and waited a few minutes then reconnected. did this twice and the sensor still won't light up. what do i do next? thx

            Comment


            • HIGHVOLTAGE
              HIGHVOLTAGE commented
              Editing a comment
              Manually swipe the magnet against the + part of the sensor with your hand and see if you get a speed reading.

            • paxtana
              paxtana commented
              Editing a comment
              Yeah it's probably just the distance is off. There's a page in the knowledge base on setting up the speed sensor so it's right distance, for reference
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