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  1. P

    2 burnt kelly controllers , anyone seen something like this

    Methods , For your questions : 1) for the video , i didn't upload it to youtube and i dont have the file. weird it's giving you location barring 2) as for cogging sound , let me explain better the situation - after motor is cool and bike is lying around over night . turn on the ignition...
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    2 burnt kelly controllers , anyone seen something like this

    Ok , I am attaching some photos to make all clear. the wiring is really simple , a pack of 25S lipo connected to the + and - on the Kelly through a shunt for the display. motor phases all correct . lighting etc are through an external 3s Lipo throttle is a magura 0-5Kohm and set correctly in...
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    2 burnt kelly controllers , anyone seen something like this

    the setup is 100% fine. the first controllers lasted around 700km before burning up and the second for 30km or so. this is around the 20th ebike i am building so i am quite confident in my wiring . in any case after the first instance i went over all the wiring and re-built the pack , so should...
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    2 burnt kelly controllers , anyone seen something like this

    Need some urgent help !! i just burnt down 2 kelly controllers and i have no clue why. 1st try - 20s LIPO with Cromotor. all wiring seems totally fine , controller and motor worked fine . than after around 3-4 cycles on turn on and starting throttle a "poof" sound and controller is dead and...
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    New 3 wheeler, 60 MPH

    Looks totally cool , but what interests me is the legal question Is this going to be sold under moped / motorcycle license ? What countries accept that ?
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    Modern boardtrack-inspired cruiser build

    the 4s / 5000mah hardcase are not good cells at all. they are dirt cheap for a reason . i used them at one time and threw the pack away after 100 cycles. they are more like B grade cells. they are not well balanced , have high resistance and huge V drop. i personally use 35c / 10S zippy...
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    Modern boardtrack-inspired cruiser build

    Go for lipo At those saddle bags you can easily fit 20-30ah of 20s lipo . 10s each bag and connect in series to the controller and parallel to charge through a balance charger
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    Modern boardtrack-inspired cruiser build

    i'll just put those pictures here : )
  9. P

    Electric dirt scooter

    i actually like scooters a lot. and i am just in the progress of making an offroad one . the Chassis is the FSP / ASP scooter : in order to still keep it light i am going to use just 4 LIPo's getting 9AH/20s and a Mac motor in the rear wheel. that should keep overall weight in the 40 pounds...
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    Aliexpress sellers hard at work.

    For 30usd I wouldn't take the risk . But the fact is that many manufacturers have direct representation on alibaba / aliexpress and are willing to sell directly to end clients . In most cases you will get a much better deal than anywhere else . However frauds ride that wave . Also some...
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    Aliexpress sellers hard at work.

    The seller is obviously not aiming for someone who knows ebikes which can see through the fraud from a mile away . But a noob trying to find a good priced ebike might fall for this . This is the main problem with aliexpress , they don't accept paypal and their buyer protection is worthless ...
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    Aliexpress sellers hard at work.

    I am located in Israel and we manufacture led displays for the event and touring markets . Very different from ebike biz :)
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    Aliexpress sellers hard at work.

    I work a lot with Chinese manufacturers and have my own factory in china (not ebike related) and you'd be surprised how good Chinese industry is this days and getting better all the time quality wise The problem is that on sites like alibaba and aliexpress there is zero fraud protection and...
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    Aliexpress sellers hard at work.

    anyone can recognize the bike ? http://www.aliexpress.com/item/fat-tire-electric-bike-20kw-20000w-72v20ah-100mph-with-reverse-27-19hp/1574182218.html 20KW + 20S/20ah + Controller for 800$ :)
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    Electric cruiser bikes

    although this is getting totally off topic to this thread, the ballon scooter you mentioned is called "dirt scoot", they also have the same in bicycle format. the problem with those is that they use small wheels with very wide drop-outs (220mm) and i couldn't figure an easy way to place a hub...
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    Electric cruiser bikes

    The Fsp is the same as the asp scooter . I just buy it directly from their manufacturer in china
  17. P

    Electric cruiser bikes

    I order from classic cycles .de . They have a huge selection of wide rims and tyre at great prices I am using 67mm rim on the front and 100mm rim on the back which means the rear triangle needs to be rebuilt for wheel clearance .
  18. P

    Electric cruiser bikes

    yes, i truly love the Zuumer. i have two of those and currently riding a "stock" one with 6.5KW 9C motor on the front wheel and it is one of my most liked scooters. the main issue with it is the total lack of suspension which kills my back after long rides at high speed (40mph+) the new one...
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    Electric cruiser bikes

    That's the one , but it's in build process . As you can see in the pics already the bottom hinge is made and the top plate . Currently we are making the shock mounts and it should be mounted this week. This zummer is still about a month away from being completed . We are adapting rear atv...
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    Aluminium 7075 vs Nirosta?

    Yes . No ready made ones . But the guy I referred you to can fabricate it easily
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    Electric cruiser bikes

    That front fork after mods is right now on my stand up scooter Still work in progress
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    Designed throttle and handlebar key fob

    I've been building for myself several ebikes and scooters with much attention to details and I'm always let down by the final looks of the handlebar. The entire throttle range on the market (and I've tried many types) looks very cheap and mostly made of hard to the touch plastics . I've also...
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    Aluminium 7075 vs Nirosta?

    Since you are located in Israel , take a look on facebook for gi customs . Ilyia can sort you out . Also there are ready made ones sold in Israel . I think your setup or line are problematic since I know bikes running 18kw on normal .25 chains with no issues
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    Is this current consumption normal ?

    might be just that. which means i have to carry around much more battery to get a decent range. currently i have in the scooters 15-20AH 20S lipo's. probably will need to go up to 40AH .
  25. P

    Is this current consumption normal ?

    Ok , just some update. first max speed is at 99% and not 115%. i tried before going to 115% but it just plays with the motor timings and you get a little extra speed for a lot of current draw. did a test today and drove 10 miles with 2 kids on the scooter (it has a huge board) going 25mph and...
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