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    Lyen 9 FET controller with 12S LiFePO4 kicks LVC too soon.

    Hello All, The controller I repaired (9 FET Lyen Edition) is working very well with new MOSFET at 48V, but not so great on 36V. ( 12S x 1P A123 LiFePO4 ) The LVC seems to be kicking in too soon. :warn: for context, I am building an e-Bike for my 12 YO kid, and did not want him to go too fast...
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    I accidently connected my Lyen controller in reverse polarity...

    Hello All, I have a confession to make. Recently I made a very very dumb mistake, and connected my newly built 12S A123 battery to my controller reversing the polarity. :shock: It made a huge spark, and some wires got incandescent, melted down and I burnt myself while attempting to unconnect...
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    Another recycled 18650 battery pack for a Magic Pie

    Hello all, This winter I built a Magie Pie hybrid bike for my girlfriend. 8) It went well, but the 48V 15A battery is ridiculously too heavy (10 kg) and way too fast (44 kph) for my girlfriend. :roll: She does not feel safe, therefore she is not using it. :cry: So this spring, I started...
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    AmpedBikes geared motor death...

    Hello all, I have been using an AmpedBikes rear geared 26" motor daily for 5 years now... Yesterday, after giving some unhappy grinding "warnings", I hitted a pothole, and it started doing this noise : https://www.youtube.com/watch?v=ZTZftF7FKbU After the five stages of denial, anger...
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    My geared hub is behaving weirdly ! ( after too much water )

    :D I have been commuting using my rear-geared ampedbike on dry days all winter long :) However, yesterday, it was warm enough to melt snow on my way back and it was all wet and salty. :o I came back home thru water pudles with no absolutely problem, but the bike was all wet ( me too ) :lol...
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    Stupid mistake...

    Oh well, :oops: I had always been very meticulous when charging my LIPO pack, but tonight I made a very stupid mistake while charging my LIPO batteries. Here are the results. :cry: What happened ? I normally split the battery pack in two to charge one at a time. I was lazy and did...
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    Video and GPS trace of last friday's commute on Kinomap

    Here is a video of my commute of last friday. With a very strong tailwind, it took me only 25 mins ! I was pedaling like if I was beeing chased by a bear all the way home... Top speed of about 50 kph... I averaged about 38.4 kph with all stops and red lights ! :shock: Well ok, "some" stops...
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    Controller replacement question...

    Hello All, I have a technical question... :mrgreen: I currently have a Amped Bikes rear gear kit that I run at 44 Volts Lipo, so far I am very pleased with 43-45 Km/h top speed... :D However, the current controller is limited to 15 amps. I thought it was a 22 amps controller, butI have...
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    Fredo's New Amped rear geared Specialized FSR !

    Hello all! Here are some pictures of my first Ebike build ! For this project, I bought last autumn a 10 years old Specialized FSR Dual Suspension Mountain bike that was barely ever used for 250$. Its like new ! I then bought and installed an Amped Bikes's rear gear kit. The installation...
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