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  1. M

    Tsdz2 clonking noise

    Hi, I have a bike with Tsdz2 engine that I have been using happily for 2 years. Now it just started making noise. It is some sort of "clonking" noise that comes about 10 times each revolution of the pedals (when pedaling rapidly the "clonk" repeats at a hi rate and when pedaling slower it...
  2. M

    New batt for TSDZ2 /cold climate/BMS compatibility questions

    Hello, I need to buy a new battery for my ebike with a TSDZ2, 36V, 350W. I plan to purchase from www.greenbikekit.com and they give alot customization options. Ive choosen this one: https://www.greenbikekit.com/36v-new-hailong-dolphin-frame-battery-with-5v-usb-charging-output.html I can choose...
  3. M

    Q100 replace internals

    Hello, I have a q100 36 V ebike, and now I want to change the motor to 24 V for overvolting (faster) with the rest ln the bike stays the same (36v battery etc). Is it possible to just open up the old 36V motor and exchange all the internal parts to the new 24V motor? Will it fit? Is it...
  4. M

    BBS02 36V vs 48V

    Hello, First, i have been searching many times but cant find proper info on this. Seems like a basic question but.. Bafang BBS02 500W comes in both 36 and 48 Volt versions. I read on another forum: 1: is the above statements true? in that case why would anybody want a 48V version? 96rpm...
  5. M

    Will the battery fit into this type of frame?

    Hello, Im considering building an e-bike with a frame like the one seen in picture below. I want to use a frame mounted battery - a dolphin pack or frame bottle pack. My concern is if the back will fit in this type of frame as it is mounted in between the two bars, on the place for waterbottle...
  6. M

    Help! I short circuited my new battery..

    I was building a wire for my new battery (this one) and had to do some adjustments on the connector. I forgot to disconnect the wire from the battery which resulted in that the + and - of the battery got short circuited directly to each other. It lasted for about 3-4 seconds. So now i am...
  7. M

    Connect throttle LED meter

    Hello. I have a wuxing throttle with a built in led meter. It is connected and works alright, and now i want to connect the LED battery meter. According to BMS battery it should be connected like this: Does that mean that I should connect the yellow wire directly into the battery + ? Wont...
  8. M

    How to measure current in controller

    Hello. I am doing the shunt mod to change current on a con61 and a Ku93 controller. I dont know how to measure the current they give after modding. Please someone give instructions on where and how to measure the amps in the controller. Thank you
  9. M

    Q100 with Ku93 48V - help needed

    I am about to build a new bike for my girlfriend with the spare parts i got lying around. A Q100 36V (201 rpm), a KU93 controller, a 48V battery. I have understood from reading here that KU93 gives too many amps for the motor, so i need to file the shunt. My question is, how much should i file...
  10. M

    Ok to run a Q100 24V on 36V ?

    Hello. I currently have a Q100 36V, slow wind(201) 700CC. It is too slow for me, it gives only about 23 kmh. So I am thinking of getting a Q100 24volt, and run it with the same 36V battery, and couple it with a new 450W controller (KU93). My questions are: 1. Will the 24V Q100 be OK to run...
  11. M

    Dead motor, please help!

    Hello. I have a 250W motor from "green bike kit", Chinese. Its similar to Q100. First the problem started with the motor "jerking" for some time, then it stopped working from time to time. And now it has stopped working completely. When turning the throttle I can hear a faint click sound from...
  12. M

    Jamming / Lockups of hub motors

    Hello. I was just planning my second E-bike build - a 500w bafang front hub, then i read about the risk for lockups or jamming of hub motors in this thread. The risk of jamming would obviously make a front hub bike much more dangerous than a rear hub. How big really is the risk that a hub motor...
  13. M

    Power vs range?

    Concerning the maximum range: if I have a cute motor and run it with 36V 12A and full throttle, compared to using the same motor on. 48V 16A using partial throttle so I get the same speed - Is there any difference in the maximum range? My question is: do I benefit from using less amps and volts...
  14. M

    Side-back mount motors?

    Hi. What do you think of the kind of motor you attach to the rear hub, like this: 24v 350w E Bike Mini Brush Hub Scooter Bicycle Cycling To me it seems like a good motor for a bike that has internal hub gears, since this motor will use the gears of the bike. What do you think? And also, anybody...
  15. M

    Help with motor choice

    Hello. I'm looking for a reliable front motor to assist in pedalling to about 35 kmh max speed. I will use a standard citybike with steel fork without suspension. I don't mind pedalling along. I weight about 70kg. I will take the chance and order from BMS battery. Which of these motors would...
  16. M

    Questions from newcomer ebike diy

    Hello, here is a couple of easy questions for the veterans: Im planning to convert my bike to an ebike and am considering ordering the stuff from BMS Battery since they seem to be cheapest option (?). Im thinking of a Bafang kit on either 36V-350W or 48V-500W or the Q100 36V250W-350W. What...
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