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  1. T

    2 Separate 14s8p batteries in series, Question

    I am going to have a 28s8p battery pack on my ebike. It will be on each side of the frame, so i was planning to make both sides their own separate 14s 8p battery pack (with bms) then use a dongle to connect them in series before going into the controller. Is this safe to do? will it function...
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    Does battery chemistry affect range?

    Im in the process of looking for some battery cell and am wondering if battery chemistry affects the range of the ev, because of the voltage range per cell. A lithium ion cell can go from ~2.4-4.2v but a lifepo4 can only go from 2.5-3.65v since the lithium ion have more effective range if they...
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    where to Buy Good Li Ion Pouch Cells in the USA

    Im looking for smth 3.7v 16-20ah with ~5c cont 10 peak. I can find a few on websites like aliexpress but dont want the hassle of going through customs again, i bought a motor and controller and got hit with 450 shipping then 500 customs tax ontop of that, costing more than the motor its self...
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    2010 Evil DH, 8000watts, LR Big Block

    This is my first build, I have been hanging around here for about a year. My goal is to achieve a very secure fast build. I like to hit jumps, drops, dh tracks and tow my friend, as well as having motorcycle (~50mph) speeds to use a source of transportation. Parts Motor: I ordered a Lightning...
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    2 Battery Hookup Cell level fusing on top of each other?

    Im planning my fist battery pack build, I am looking at doing 20s 8p, simple design 20 cells long all connected in series and 8 cells wide for parallel 160 total. I need 7000w peak for a tangent ascent motor so 7000/72v = about 100a. 100a/8= 12.5a per cell. I was wondering if I can stack 2 of...
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    AliExpress 90ah pouch cells legit?

    https://www.aliexpress.us/item/3256804461395297.html?spm=a2g0o.detail.1000013.1.cf08507d18hJ4G&gps-id=pcDetailBottomMoreThisSeller&scm=1007.13339.291025.0&scm_id=1007.13339.291025.0&scm-url=1007.13339.291025.0&pvid=bf40c2d8-b01b-47f7-8f79-e29e9d1730f9&_t=gps-id:pcDetailBottomMoreThisSeller,scm-ur...
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    Tangent Ascent ( Astro 3220 3T motor )

    Im planning on putting this motor in a build, i was wondering what the max voltage i can run through it is? i know the castle controller can only take 52v i think. i would get a 72v controller (any suggestions? :) if you guys think that it will work. also what is peak power on this motor, ive...
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    Looking for CYCLONE ebike motor or kit 3000w-6000w

    if anyone has a cyclone motor (3000w-6000w) or kit hmu
  9. T

    High Amperage 72v BMS suggestions?

    Im going to be building a 72v battery capable of around 800-900 amps. Realistically ill only be using that many for around 5-8 seconds max, but i want my bms to be able to handle it without bypassing. I was looking at the DALY 300a or 500a, but they are pretty big. Anyone have suggestions?
  10. T

    How do you get the correct cad file for your dirt bike?

    ive been planning a 2009 crf450 electric conversion, and the only frame i can find a cad file for is a 2006 crf250, ive seen the conversions in the emotorcycle build threads and they all seem to have the correct cad file for their frame, where can i find one for my bike?
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    QS 180 90H vs Zero 75-7

    I have the opportunity to buy both a 75-7 and a QS 180 90H for around 11-1200 after shipping and tax. Ive heard that the QS 180 has higher peak outputs than the 75-7 at around 70kw. But the 75-7 is like 5 pounds lighter (i think) but when i look at the dimensions i think it is bigger. so the QS...
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    Need Help Changing Encoders in a Zero 75-7

    I am planning on purchasing a zero 75-7 motor from calfee designs, and was going to be using a sevcon size 6 gen 4 but i forgot to check serial number and i got on that is meant for hall sensors ( although mabye that was a blessing as i wont have to deal with the programming) so if anyone wants...
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    Sevcon Gen4 Size4 part numbers

    I bought a sevcon g4 s6 on ebay and the part number is 634A85101, will this work with the Zero 75-7 motor (sin/cosine i think) anyone know if this will work, or where to find what these numbers mean (specifically the last 3). if it wont work is it possible to change?
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    Need Help Choosing Main Contactor for 75-7 and Sevcon

    How do i choose a contactor between the battery and controller, that i can use a key to turn on? Im using a *zero 75-7 motor *Sevcon gen4 size6 * battery hopefully 80v * hopefully pushing mid 50s in hp peak Also what do i use for a wiring harness? should i just get a used zero one off ebay?
  15. T

    Mobipus 72600 and Zero 75-7

    Does anyone know if a zero 75-7 will work with the mobipus 72600?
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    Starting 2009 Honda CRF450 Build

    I got a pretty sick 2009 CRF 450 Roller for 1000, it has new suspension internals and rims/hubs. Its also power coated black which looks pretty cool. Im looking to convert it to a high power electric bike. Im going to try and make it as powerful as the stock 450 (55hp). For my range and speed im...
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    Need Help finding a good 40-50kw peak

    Ive been looking for a motor that will supply around 40-50kw at peak hopefully around 15kw continuous for a crf450 i am going to convert. I was looking at the me1507 and me1616 but alot of people say they really under preform. I also saw the m-force motor that sketch used in the super moto...
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