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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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    question about possible bad hall effect sensor (updated)

    Surprisingly, my BMSBattery controllers work with my Puma-Ezee geared motor, despite some stumble at acceleration.
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    BMSBattery 12 MOSFET 500 Watt Controller

    You seem to be right Russell, the curves fall suddenly above 20 mph. I knew that, but with other controllers, when the speed reaches its peak, power and speed stay constant, so the ride is always smooth. In the present case, when the power falls, you can't sustain your speed, it falls, then the...
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    BMSBattery 12 MOSFET 500 Watt Controller

    I've got a 350W and a 500W controllers from bmsbattery and here are my observations : - They can work sensorless with my Puma and my GM (I fried some hall sensors) despite some vibrations and noise at startup. - I drained one battery, because neither the bms nor the controller cut off. Need to...
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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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    BMSBattery 12 MOSFET 500 Watt Controller

    Hi, I have tested the 12 mosfet controller with my Puma motor. It can only reach 15 mph on no load, whereas it does 27 with its standard controller. Do you think that the 12 mosfet controller has a feature that limits the current in order to comply with the european speed limit ? If so, how can...
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    Puma-Ezee, not so good ?

    Nobody ? Today I've tested the motor with no load on 36V. Here are the results : original controller : 46 km/h (27 mph) Goldenmotor "rege" controller : 41 km/h (24 mph) BMSBattery 12 mosfet controller : 25 km/h (15 mph) ! I guess that the last one may be restricted to suit the european law, but...
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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

    My sensorless controller is a Clyte. It works fine with both my NineContinent and Goldenmotor kits, very smoothly. I thought that the explanation for not working with the Puma was because when I launch the wheel to reach the ignition point of the controller (about 3-4 mph), in fact the freewheel...
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    Speed of 6*10 winding @ 48 V

    Hi, I have got both GM and NC 6*10 motors. Used with 48V on a 28" wheel, the GM does 48 km/h on the flat whereas the 9C can't reach 40. On small hills, the difference is reducing, it seems that the balance is about 4% : on steeper hills, the 6*10 is a bit faster, and gets less warm. But it 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 ?

    I followed your advice, ordered A1302 and I will try it. Thanks a lot.
  14. T

    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.
  15. 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.
  16. 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/Infineon bike review

    Hi, Do someone know how the original Puma compare to this one ? http://www.das-elektrorad.de/umbausatz.htm (Puma-Ezee) It has not the same casing, and the 57 km/h claimed seem optimistic to me. I wrote an e-mail to Teamhybrid about the difference between this one and their Puma, but got no...
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    Puma, Ezee, still confused

    I just have read the subject posted by Rob Melektau about his Ezee : http://endless-sphere.com/forums/viewtopic.php?f=3&t=10847. The motor on his bike seems to be the same as the one I was talking about, seen on http://www.das-elektrorad.de/umbausatz.htm. If it is confirmed, its performances...
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    Puma, Ezee, still confused

    Very interesting opinions. Now I am tempted by this "Puma-Ezee"... I have e-mailed to the vendor, he told me : 1) that the Puma on Teamhybrid should be an old version 2) that an order needs several weeks for delivery. I guess he first takes the order (and the cash), then orders in China. I know...
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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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    Anybody have more info on these new GM MINI hub motors?

    I have asked Mr Yao about this motor. He replied that it is geared, but could not work with 48V. Disappointing for me, because I have a 48V battery pack. Considering that the Bafang motor can handle 48V, maybe this one isn't a Bafang ?
  22. T

    controller for Cyclone kit

    Thank you for your replies. Which one determines the current drawn : motor or controller ? I mean, if the motor needs 50 amp on a hill, will the 30 A controller smoke, or will it deliver its current with no problem except a lack of power ? (sorry for my English)
  23. T

    controller for Cyclone kit

    So, I suppose that a 48v 25A controller from Goldenmotor wouldn't be sufficient. Is there another cheap option ?
  24. T

    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...
  25. T

    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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