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  1. kmxtornado

    KT Controller / LCD4 shuts off intermittently

    I haven't quite figured out why, but my KT LCD4 display shuts of sometimes at stop lights. I thought maybe there was a timer where if the motor is unused for a period of time and there is. In the manual, it says 5 minutes.However, even occasionally at 2-way stop signs where I'm waiting for cars...
  2. kmxtornado

    KT Controller P5 Setting for 48V LiFePo4

    Hi, I'm trying to make my battery level readout more accurate. Since a LiFePo4 battery has a very different state of charge chart than a Li-Ion one, how should I properly set my P5 setting on my KT controller? P5 is the battery monitoring settings which tells me how "full" my battery is using...
  3. kmxtornado

    MPH not showing up on KT LCD4

    How does the bike sense speed? On my old setup, I had a magnet and sensor on the wheel that sensed the MPH on a separate cycling computer (has nothing to do with the e-bike kit). However, on my new setup with new controller (KT's 500w 25a), there's no such sensor nor connector. I assume I just...
  4. kmxtornado

    Grinding noise from motor?

    I recently swapped controllers and tried to figure out the wiring. I’m confident I connected everything correctly. However, there’s a grinding noise from the motor when the throttle is engaged. The wheel spins very gently. My guesses: 1. Can a loose 1 of 3 motor wires cause this? I know that...
  5. kmxtornado

    Are my throttle wires mixed up?

    Looking for your expertise again. This may be the last question before I can get my ride running with an upgraded controller. My KT controller has the red wire in the middle whereas my throttle connector has the red wire on the side and the black wire in the middle. Do I need to swap the...
  6. kmxtornado

    5-wire motor to 6-wire controller?

    Hi, hoping you guys can help me out. I’m sure this is an easy one for some of you but I may be stumped if my assumptions are incorrect. My motor (hall?) has 5-wires on the connector but my new controller has 6-wires. Are they compatible? Do I just skip the missing white wire? From searching...
  7. kmxtornado

    How to connect 4-wire throttle to a 2-wire controller?

    Hi, thanks in advance. I have this old school thumb throttle with integrated voltage meter from 11 years ago. I'm replacing my controller, but the throttle wires on the new controller only has 2 wires. How do I make the connections? My guess is that two of the 4 wires are for power to light up...
  8. kmxtornado

    Am I an idiot for using V-brakes?

    The bike I recently revived from 2011 uses V-brakes. I was thinking about disk brakes but finally decided it's not worth the money for me currently. The only reason I have concern now vs before is b/c I'm taking on my hills since moving and also I've overvolted it to run on 48v so it's got a bit...
  9. kmxtornado

    What is sinewave vs squarewave?

    I don't need to know too much of the technical differences. Just need to know which one I have (if either) and therefore what to buy to replace the one I have. Are on controllers either one or the other? Mostly squarewave?
  10. kmxtornado

    State of Charge (SOC) for Li-Ion vs LiFePo4

    I see that the state of charge chart for my 48v LiFePo4 shows 20% is 51.6v. By contrast, a 48v Li-Ion battery at 20% is all the way down to 43.7v. Why is that when both lithium chemistries start out at roughly 54.4v (at rest)? The reason I ask is out of curiosity but in application, I'm...
  11. kmxtornado

    36v motor overvolted to 48v needs what sized controller?

    I have a 36v 500w motor that I overvolted to 48v. The existing controller which I'm reusing is rated for 36-48v and 22amps so I'm assuming my motor draws that at the very most. Unfortunately I don't have the specs from this old DIY kit from 2011. I'm trying to add PAS and a display and will need...
  12. kmxtornado

    Why do batteries have different connectors for charge and discharge?

    I'm used to RC car Lipo batteries that use the same connector for charging and discharging. Why is it that e-bike batteries use different connectors for charging and discharging? I recently purchased a LiFePo4 battery that has 2 pairs of leads, one for charging and one for discharging (via the...
  13. kmxtornado

    Trouble finding an affordable LiFePo4 charger

    With LiFePo4 having a full cell voltage of 3.65 and Li-Ion of 4.2v, I understand I definitely cannot use a Li-Ion charger to charge my LeFoPo4 pack natively. However, if I'm able to set a charge of 80%, would that theoretically work? In fact, I just noticed that the charger that comes with my...
  14. kmxtornado

    What charging connector do you have on your battery?

    UPDATE Thought I should follow up with what I ultimately went with. SB50 connectors for discharging. APP45 for charging. My LiFePo4 battery came with a household connector. Made an adapter to work with my APP45. ORIGINAL POST Curious what connector you guys are using for charging. Please...
  15. kmxtornado

    Charger with a screen?

    UPDATE I will be using an inline watt meter between the charger and battery to get my numbers. Accidnwtally bought a 200a one but the wires were way way too big for my little wires. Will reorder. The charger I bought is a metal case one, 5A. It replaces the stock plastic case one which I’m...
  16. kmxtornado

    Are throttles compatible between various voltage systems?

    Stupid question, but if I overvolt my 36v motor to 48v (controller is within spec) do I need to change the throttle? I assume no. I have a cruizin cooler (see sig) and when I overvolted that, I did have to replace the throttle but I think it was only b/c the throttle had a built in voltage meter...
  17. kmxtornado

    Li-ion or LiFePo4?

    I understand the advantages of LiFePo4 over Li-ion, but Li-ion is cheaper and the more dense making the battery pack smaller, lighter and easier to fit in my rear rack pack. Trying to justify getting one over the other. Curious why you guys picked on vs the other. Comment if you use a different...
  18. kmxtornado

    What battery connector should I be using for a 48v 1000w system?

    My controller is a 22amp, so I figure any connector type will suffice. Curious though how you guys determine what connector type to use. Anderson poles, XT60's, deans? Please comment and say why you picked that connector type over the others. My ebike conversion currently has anderson poles...
  19. kmxtornado

    What is your recommendation for 48v 20ah Lithium battery?

    UPDATE: I went with a LiFePo4 for the safety aspect and ease of charging and discharging and storing. Decently priced at about $337 shipped. Came with SB50 Anderson poles which I use for discharging. Bought some APP45 for charging. Made an adapter because the charger connector that comes with...
  20. kmxtornado

    How to read SLA battery label

    Here comes the newb questions. 1. I'll try to answer it myself and hoping you guys can tell me if I'm right or wrong. My concern is that I have no clue when my battery is done charging. My understanding is that I can take a volt meter to it and when it reads 14.50-14.90v, then it's done...
  21. kmxtornado

    How to charge (3) 12v SLA batteries in series

    Trying to revive this old guy and hoping you guys can help me out: https://www.youtube.com/watch?v=dwBNZ0LoXIo My LiPo battery went bad way back when and I'm replacing the setup with (3) 12v SLA batteries. I know how to connect them in series (do I really need 12AWG wires), but I'm hoping...
  22. kmxtornado

    No balance lead on LiPo batteries?

    When I did my electric bike conversion about 6 years ago, it hadn't occurred to me at the time that there are no balance leads. Fast forward to now, I'm into RC cars and FPV quadcopters and all LiPo's need to have a balance lead to keep the cells balanced. Why don't larger e-bike LiPo's have...
  23. kmxtornado

    Electric Stand-up scooter riding technique

    Feel free to share and comment. I'll start off. All of this is in reference to my Eco Reco S3, although much of this will apply with other e-scooters as well. STANCE: I'm regular footed (as opposed to goofy footed) and prefer that my front left foot is somewhat parallel to the deck but offset...
  24. kmxtornado

    How to select the right stand-up e-scooter

    First off, what makes me the guy to write up this guide? Just a joe-shmo who's done a lot of online research and who recently picked up an electric stand up scooter. I have a number of rideables in the garage. I'm a bit of a nut that way. Foldable skateboard, recumbent trikes, electric ice...
  25. kmxtornado

    In depth Eco Reco S3 Review

    This review is on the more recently released S3 model. Differences from the older M3 model may be minor but worth mentioning to those who haven't navigated the Eco Reco website and conducted other extensive research in depth: 1. It's 2" shorter. 2. It weighs 7 lbs less. Yes, that means it's...
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