Recent content by sensi

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...

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...

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

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

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...

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...

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...

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...

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...

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...

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.

Am actually building frames from scratch not modifying anything

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

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...