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    Yamaha PW-ST Motor Jerky

    You said yours needed a sensor, did you know that already or did you get them to troubleshoot? If so how much approx was it? Thanks. To be honest worst case scenario is a new motor and there’s one on eBay for 250 with under 100 miles on it, less powerful version but as long as it gets to 15mph...
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    Yamaha PW-ST Motor Jerky

    Yes, it’s broken but the buttons still work fine. Idk I’m no expert either clearly lol. Cheers
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    Yamaha PW-ST Motor Jerky

    Thanks very much, if I can’t get to the bottom of it, then I will, I’m gonna take the motor apart tommorow and see if anything’s out of the ordinary. Cheers
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    Yamaha PW-ST Motor Jerky

    Hi, thanks for the video, I might actually need that because I have just found when I hold walk mode and hold the bike on the floor so it doesn’t move, then I hold the back wheel up it does around 2 crank spins without pulsing, but it’s got a rough wind what could this be? Maybe I need to take...
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    Yamaha PW-ST Motor Jerky

    I’ve managed to get to some mode it says d, think it’s the diagnostics but there’s a -1- and -2- etc until 4, then it says end after, what do I do on this, the manual isn’t very clear it says press the light button and it flashes for 0.2 seconds but it doesnt
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    Yamaha PW-ST Motor Jerky

    Half haha, yes I will try that now, I’ll look at the manual again and see if anything works. Cheers
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    Yamaha PW-ST Motor Jerky

    Hi just tried cleaning it but again nothing worked, I don’t like the way they don’t show error codes, I’m starting to think that I need to take it to a bike shop and see if they can tell me what’s wrong, saves buying a new motor and maybe it’s not that, I’m also thinking of taking the motor off...
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    Yamaha PW-ST Motor Jerky

    I’ve put that into my watch list now as that’s cheaper than the ones I’ve seen, once im home ill clean the connections and try and see if I can find how to reagline the connections. Thanks mate for the advice, I hope this works!
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    Yamaha PW-ST Motor Jerky

    Hi just tried that but unfortunately didn’t work, I don’t have one of them function select switches on mine, here’s my display. Idk what else it could be. Thanks for your help
  10. E

    Yamaha PW-ST Motor Jerky

    Hi all replaced my sensor today and magnet, still the exact same issue, flashing odo. Walk mode jerky etc, I’ve looked at the manual a bit but nothing works I’ve tried the high and then light button to see if the high flashed and it didn’t same w std eco etc. as soon as I turn the bike on the...
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    Yamaha PW-ST Motor Jerky

    Yeah bought it not working, person I bought it off suspected the motor was at fault but not sure, to be honest I didn’t clean it much just wiped it and it looked in good condition, but these sensors can do that because like I said in another post the carrera I had. The sensor looked brand new...
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    Yamaha PW-ST Motor Jerky

    I’ll go have a measure now, I don’t know why but I didn’t even think of water ingress in the crack , Update The gap can fit 2 pound coins in but moves the spike a little so around 5mm, idk if this is too short or not. Cheers
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    Yamaha PW-ST Motor Jerky

    Yeah, I think it is broke because I find when I turn on the bike the mileage instantly flashes, I’ve read that the controller sort of like checks everything is working before turning on, this is what causes the mileage to flash instantly. Thanks for your reply, cheers
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    Yamaha PW-ST Motor Jerky

    Yeah I will, I do hope it is just this sensor as on my electric Carrera I had, the sensor looked brand new and didn’t have anything visually wrong, I bought a new one and just popped it in and it was working perfectly fine, this is what I’m hoping for this, cheers
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    Yamaha PW-ST Motor Jerky

    It’s Yamaha screen and motor it’s on a haibike hardseven 7, I’m not sure if they don’t have ones not listed and I’m not even sure if they pop up on the screen because I have read they do and they don’t, Cheers
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    Yamaha PW-ST Motor Jerky

    I did clean the other end yesterday when it was off but to be honest it was very clean just gave it a wipe, the symptoms apparently lead to a faulty sensor, I have bought a new one with new magnet and a big washer I’ll pop that on once it’s here. I don’t think it would be the controller as I...
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    Yamaha PW-ST Motor Jerky

    Also if any help when I turn the display on the mileage is already flashing? It doesn’t give the magnet a chance to give a reading
  18. E

    Yamaha PW-ST Motor Jerky

    Hi I’ve just done that but still no difference, I moved it too (see pic) i think the whole sensor might be dead or something.
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    Yamaha PW-ST Motor Jerky

    Alright mate good idea, I’ll go pop it back on the bike, and stack some magnets like you said and pedal, thanks for the help I’ll keep you updsted
  20. E

    Yamaha PW-ST Motor Jerky

    I tried moving a magnet past that area and the speed still didn’t change on the display, I have ordered a new one and I am really hoping this fixes the issue! Thanks for the reply Chris