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  1. Bigbikebob

    Hub drive vs Chain drive and frame questions

    I am about to do a stand-up e-scooter build for the first time after doing 2 bicycle builds (based on Hub motors). First I need to decide if I go and buy a used dirt cheap e-scooter and and just upgrade it to fit my needs. Or is there a good frame option for e-scooters like there are for an...
  2. Bigbikebob

    DC to DC step down and on and off switch

    I recently Purchased a "DC to DC step down (48V to 12V)" going to use it to power all my ebike lights that require 12V. I want to add a on/off switch that will turn on and off my lights. My DC to DC step down connected to my 48V battery and I can put the switch between them or I can put the...
  3. Bigbikebob

    Throttle cuts off after I hit a bump / pot hole

    While going at a fast speed and holding the throttle twisted I started to get cut off if I hit a bump or a pot hole. If I try to rotate the throttle more nothing happens and only when I release the throttle completely and twist again the problem is solved until the next bump / pot hole. I am...
  4. Bigbikebob

    Crimping connectors

    I prefer to avoid soldering and from what I read crimping is the preferred method to join wires in the auto and aero industry. Hall sensors / throttle are covered by jst-sm connectors Battery can be connected via Anderson power connectors which I don't like because they are bulky and have a...
  5. Bigbikebob

    Looking for Horn, front & rear led lights battery connected

    I am looking for a bright head led light, with a proper downward pattern so not to throw too much light into oncoming driver's eyes. And a tail light, the basic is just to be seen by cars and a huge plus would be a tail light that comes with winker lights that I control from the handlebar I am...
  6. Bigbikebob

    amps, volts and top speed

    I am thinking to build a new bike and decided to dive deeper this time regarding the motor and Wattage :) I have read a few posts about volts/Amps and in my understanding volts are the pressure in the pipe and amps are the amount of "water" that are going via the exit surface aria of the pipe...
  7. Bigbikebob

    Motor locks and unlocks(at high speed) magnetically problem

    While I was going up a steep hill my power was cut and I heard and felt the motor resisting to foreword motion. I tried to turn on and of the controller and nothing changed, the bike was dead. the motor itself resisted to motion by hand. On my way back I was going down the same hill (with the...
  8. Bigbikebob

    Qestions about Cycle analyst variations

    I am thinking about buying a Cycle analyst. I got a LYEN Edition Controller 12 FET 3077 Mark II Extreme Modder HSL Sensorless which means that I can pick a DP variation. Because I am using a Sensorless controller, in order for me the read the speed of my bike I need to use the DPS variation...
  9. Bigbikebob

    Can't decide how to wire the on/off switch

    My Lyen controller has an ignition wire that is connected to 48V of the positive battery lead and to a key-switch which, when turned will cut on/off the ignition. I want to add a on/off switch on my handle bar so I can turn off the bike if I need to without using the key-switch. For example, a...
  10. Bigbikebob

    building my first Battery pack and got some questions

    After completing couple of e-bike builds and a lot of troubleshooting I feel it's a good time to start looking into building my own battery pack drive the cost down. I feel I read enough to start asking questions :) from what I understand there are variations of lithium battery chemistry...
  11. Bigbikebob

    CRG Hindsight mirror on an e-bike experiment

    I think that the best policy riding side by side with cars on an e-bike is a "No special treatment" policy. For a really long time I was looking for a mirror for my e-bike so I wouldn't have to turn my head around every time I need to see what is behind me and lose track what is a head. I tried...
  12. Bigbikebob

    Controller started to cut off power under load - Solved

    I have a MagicPie 3 motor upgraded 10awg phase wires overclocked to 2KW connected to External LYEN Edition Controller 12 FET 3077 Mark II Extreme Modder HSL Sensorless controller (with 12awg power wires) and powered by a 48V 20Ah LiFePO4 battery (60A BMS) that can supply up to 40A of contentious...
  13. Bigbikebob

    Can a "Watts Up" meter handle constant electrical load?

    I am almost done building my bicycle. I already ride it every day but I still have small things to finish. Among the things I didn't done yet is the "how much juice is left" indicator. Now it is adventures of me to ride without knowing when exactly my battery going to die but I can do without...
  14. Bigbikebob

    looking for hydraulic cut off disk brakes options

    I currently use a Shimano hydraulic disk brakes. the only drawback is the lack of cut-off feature for safety. I did read on the subject and found 3 main options. 1.The total solution from Tektro or Hygia - which I don't like because I prefer Shimano ( and I already own hydraulic disk brakes)...
  15. Bigbikebob

    Regenerative brakes and Lyen controller in particular

    From what I read, if regenerative breaks are enabled (and supported by the controller) instead of just cutting power from the motor when I press the breaks the controller will slow down the motor by using magnetic force against the spinning wheel to slow it down and in the posses will charge...
  16. Bigbikebob

    Bike "died" while riding, a diagnostic question

    I am using a magic pie 3 motor (sensorless) clocked to 2000W with 10AWG upgraded phases. LiFePO4 48V 20AH battery with a 60A BMS (battery gives up to 40A). Lyen 12FET controlller. While I was riding my bicycle it suddenly stooped working, at first I thought that my battery was low on juice (it...
  17. Bigbikebob

    Wire gauge and allowed current?

    Hello I am in a process of building my ebike and one aspect I never noticed in the past is the wire gauge, mostly because my previous kit was 500W 36V and was purchased from one supplier. Now that I enter to the 1000W club and would like to overclock to about 2000W, things like "pipe size"...
  18. Bigbikebob

    12 FET 3077 Mark II Extreme Sensorless controller questions

    I have purchased from Lyen 12 FET 3077 Mark II Extreme Modder HSL Sensorless Controller and I got a few questions about the seeings and the software *I already sent an email to Lyen I just really want more prospective. My setup is a goldenmotors magic pie 3 1000W motor with a 48V with a 60A...
  19. Bigbikebob

    Need advice: electrical connectors for my battery enclosure

    Hello everyone, I am in the process of building DIY enclosure(see attached picture) for my 20Ah 48V battery, so I can mount it inside the frame of my bicycle. What I need is a recommendation on a few waterproof connectors to and from my battery, connectors I will mount on the walls of the...
  20. Bigbikebob

    Looking to buy parts directly from China , recommendation?

    Hello everyone, I am about to build me a new bike and i am in the market for parts. I want to cut the middle man. Most of the motors and e-bike parts are made in china and then sold to reseller that sells them to us. I want to buy straight from the source, from the manufactures. In the past I...
  21. Bigbikebob

    What controller can run with and without sensors?

    I am doing extansive reserch about controllers :) and from what I see there are 2 main types. There are those that run sensorless and those that run Sensored. Both modes have advantages and disadvantages. What I would like to know if there are controllers that can do both?
  22. Bigbikebob

    Magic Pie III is got resistant when turned on, throttle have

    Hello, I was replacing my throttle and before soldering it's wire I checked it and it was working(my hall sensor wire was giving a 5v reading and the wheel was speaning). When I started soldering the new throttle cable I tried activating the wheel again and nothing happened this time. Now...
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