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  1. sensi

    Hows my ebike build quality

    This is my third prototyte kind of. I believe I have done a better quality than the other one. Please help me understand what you think.
  2. sensi

    What is the meaning of 40H, 50H, ETC IN MOTOR DESCRIPTIONS

    Thank you. Unfortunately, am based in Zambia and its very difficult to find new cells here. Am making contacts to be sourcing the cells. for now I have a well made battery from Laptop cells. I selected only low resistance, 2.2ah cells. This battery has been saving me since January 2023 with 80A...
  3. sensi

    What is the meaning of 40H, 50H, ETC IN MOTOR DESCRIPTIONS

    Thank you for the alert. I have bought these for testing thier products. Its 200mm dropout evening them told me that. It comes with Huge Votol EM-150 controller. This controller is big. 150A even the Motor is very heavy and huge. I hope for the best Yuma confirmed that this was thier direct...
  4. sensi

    What is the meaning of 40H, 50H, ETC IN MOTOR DESCRIPTIONS

    Oh, I see, for sure the motor is very heavy, I bought 3000w and 2000W they both weighed 23.5KG in one box LINK HERE Wuxi DingKuo Technology Co., LTD
  5. sensi

    What is the meaning of 40H, 50H, ETC IN MOTOR DESCRIPTIONS

    I got a Yuma 3000W motor 72v 40H. What does this 40H Means?
  6. sensi

    How can I easily tap threads on Bottom bracket

    My apologies for taking time to respond. for whatever reason i could not be allowed to post. I have 8 2.2ah cells in parallel. I had taken dimensions before my laptop crashed. I seem not to find the pics. I can't honestly remember. But this motor can hold the power of 3000w sinewave controller...
  7. sensi

    How can I easily tap threads on Bottom bracket

    That one was a learning phase. CONTROLLER: The controller I bought 50A 72V sinewave, second hand Bumble bee classic. BATTERY: The battery i made it from Used laptop batteries, tested and picked only between 2.2-2.5AH cells. Checked the discharge rate for each cell to make sure some don't drain...
  8. sensi

    How can I easily tap threads on Bottom bracket

    Yes, I want to be an ebike pioneer. The idea is making my own frames and buying motors and controllers from China, of which I already have a contact to the manufacturing industry Yuma motors. they are good near QS motors. Thank you very much for your help, it means a lot. I will check the link...
  9. sensi

    How can I easily tap threads on Bottom bracket

    Am learning and getting into producing custom bikes for sale not just for self use. We don't have such bikes in Zambia and people are amazed with the one I made and already want me to produce for them. If I keep learning more and try to understand the geometry sooner, I can make a good living...
  10. sensi

    How can I easily tap threads on Bottom bracket

    Ok, so using this crank I don't need to thread the tube? If that's the case, I will try I have seen these in the shop somewhere. As for the tap I was thinking that new one looks unreliable. Its great that you have recommended it. I will get one set. Am learning all this from nothing...
  11. sensi

    How can I easily tap threads on Bottom bracket

    So This means I still need a shell inside the pipe? The challenge is buying those shells will be expensive shipping because of weight. Below is the image of the type of shells we have in Zambia. Hard to use for my purpose. What about this used tool looks to be in good shape and strong. its...
  12. sensi

    How can I easily tap threads on Bottom bracket

    Thank you, But on my response meant the usage of 3,000W on 1000W motor not heating despite the controller been more powerful than the motor. and am using a BMS that can give 80A continuous.
  13. sensi

    How can I easily tap threads on Bottom bracket

    Am actually building frames from scratch not modifying anything
  14. sensi

    How can I easily tap threads on Bottom bracket

    This is my completed frame commuting with it to work everyday, 1000W motor and 3000W controller from Bumble Bee classic bike. Working without heating at all
  15. sensi

    How can I easily tap threads on Bottom bracket

  16. sensi

    How can I easily tap threads on Bottom bracket

    Yes , I want to make my own frames from scratch also tapping threading using any pipe available and suitable and weld it. In our country its not easy to find those pre-threaded shells. So the need to make my own from scratch. Below is my frame made from scratch, That bike can do 70k/h. Am...
  17. sensi

    How can I easily tap threads on Bottom bracket

    Thank you for your reply. I will take it that way.
  18. sensi

    How can I easily tap threads on Bottom bracket

    Can anyone help me to find a cheap and reliable way to make bottom brockets with threads using any ordinary pipes. I have managed to make my own frame from scratch. The enduro type frame. Now I need to be able to make threads. Any help will be appreciated
  19. sensi

    CAN THIS BE USED AS LOAD RESISTOR

    Thank you all for response. Maybe I should just list them on eBay. It seems I can buy a 3000w motor out of the cash out. :D :D I got these from a Analogue TV Transmitter that I savaged from work.
  20. sensi

    ANY RECOMMENDATIONS FOR LINK TO SOURCE GOOD LITHIUM CELLS

    I thought I did answer, sorry. The controller is Bumblebee Classic sinewave controller, 50A and can go up to 72V. But am going to be using 16s and wanted 16P as well since the batteries I have at the moment are from laptops. If it happens that I manage to buy better batteries, I would love to...
  21. sensi

    CAN THIS BE USED AS LOAD RESISTOR

    Hello Everyone, I happened to savage a Analogue Transmitter parts. My question is can used this 800w load resistor when testing batteries. I have about 4 of these. Maybe I can put them in parallel. What's your advice.
  22. sensi

    ANY RECOMMENDATIONS FOR LINK TO SOURCE GOOD LITHIUM CELLS

    Is there any recommendations on 4.2 charger for charging individual cells before capacity test
  23. sensi

    ANY RECOMMENDATIONS FOR LINK TO SOURCE GOOD LITHIUM CELLS

    Thank you will check on them to make sure
  24. sensi

    ANY RECOMMENDATIONS FOR LINK TO SOURCE GOOD LITHIUM CELLS

    I finally found a link that seem regit. These guys have explained testing the the capacity of the cells after buying from Aliexpress and they match the supplier. https://youtu.be/oXQrK5CCDfY thanks to these guys. Will prepare myself to order from these guys soon. Thank you for contributing to...
  25. sensi

    ANY RECOMMENDATIONS FOR LINK TO SOURCE GOOD LITHIUM CELLS

    @LewTwo We are landlocked but we call ourselves as landlinked. :) The problem I have is air shipping. Most of our couriers don't accept batteries because of regulations. Some couriers accept shipping batteries from China but through water not air, which isn't a problem I can wait for 3 months...
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