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  1. T

    Yamaha mid-drive external controller

    Hello, I am tired of the frequent electronic breakdowns on my MBK electric bicycle, powered by a Yamaha mid-drive motor (PM series). So, I think about adapting an external controller. I have read about some swaps on Bosch or Panasonic motors, but could not find the topics. I know that I will...
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    more amps for a restricted crank motor

    Hello, I have a MBK bicycle with a Yamaha crank motor. Due to the EU regulations, its power is limited to 250W. I am used to ride a bike with an unrestricted hub motor, so the MBK seems rather weak compared to it. I tried to series a 12V battery to get more voltage (originally 36V), but the...
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    How to prevent a wattmeter from overvoltage ?

    Hello, I fried my wattmeter twice in 2 weeks (in fact 1 Watts'up and 1 Turnigy). I used them on a trike with a GM 16" front wheel and a 48V battery. The first time, my GM rege controller sent more than 70V to the wattmeter (limited to 60V) though I was only riding at 10 mph ! So the wm cut off...
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    Puma-Ezee, not so good ?

    Hi, I bought a Puma/Ezee kit from a German seller. First I had to exchange it because it was defective. Now I have got a functional one, with a 20A controller. Unfortunately, I feel quite disappointed, compared to what I have read about Puma, Ezee and BMC (don't know exactly which model is...
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    sensorless controller on geared motor

    Hi, I have a Puma kit that doesn't work well : it needs a reverse rotation to start, and then cuts off after a few seconds. It looks like a Hall sensor failure, doesn't it ? By the way, I used a voltmeter to test the sensors : one of them always shows 5.0V when manually rotating the wheel. So I...
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    Hall sensors for throttle ?

    Hi, Since I am used to fry my throttles, I don't want to buy and buy again $25 throttles. I guess they only need a new hall sensor to work again. I was told that they are not the same kind of sensors as the ones used into the motor, so do you know what kind of sensor I should order ? Thank you.
  7. T

    36/48V controller ?

    Hello everyone, except for the Crystalyte controller, which is quite expensive, do you know another one that can handle both 36 and 48V, I mean about 31V mini and 56V maxi ? E-crazyman controllers don't seem to do this. Thank you.
  8. T

    short on a controller

    Hi, I have a Wilderness Energy sensorless controller. After several monthes unused, I decided to mount it again with my Golden Motor. Unfortunately, when I plugged the last bare wire into the battery, there was a big spark (bigger than the usual one) and the wires were glued (like soldered) to...
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    Puma, Ezee, still confused

    Hi, Looking for a motor both fast and torkey for my heavy trike, I guess the Puma is a good one. But despite reading the forum, I am still confused about the different versions, because I don't understand everything (I'm French). Hey, not that French people don't understand anything :) . In...
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    controller for Cyclone kit

    Hi everybody, Considering that the Cyclone external controller is expensive and very big, I am planning to buy a 1200W Cyclone kit without the controller. Do you think that I could use a controller from another brand ? Cyclone told me that it must have 120 degree Hall effect sensors, and someone...
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    what does brake my hub motor ?

    Hi everyone, My GoldenMotor wheel has became very hard to turn with hand, and with no load, it hardly raises 15 mph, instead of >30 before. No particular noise. I opened it and took the stator apart from the rotor, found no trace of scratching, then put them together again with some grease, but...
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    where to find hall sensors and other part ?

    Hello, Since I have fried my hall sensors, I use a Crystalyte sensorless controller, but it seems that I loose a lot of torque compared with my first controller. So I have 2 questions : Do you think it is a result of sensorless system ? If so, I'll go back to the standard controller, but I need...
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    sensorless controller on a hall effect motor

    Hello, I am a user of the Goldenmotor kit. I was happy with it, until the hall effect sensors blew up. I had them changed by Golden, but they blew up again. I tried to change them by myself but didn't succeed. So I was fed up with sensors and ordered a sensorless controller at ebikes.ca. Now I...
  14. T

    36V on a 48V controller ?

    Hello everybody, I am French and not really used to talk in English, so please don't be cruel... I have got a Goldenmotor with 36V 15Ah lithium battery, and I would like to boost it occasionaly with an additional 12V battery, like Xyster does for example. Of course I am aware that I need a 48V...
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