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  1. Z

    How is this voltage sag on my 22S2P LFP battery

    I recently completed a 22S2P battery pack by soldering 44 Gotion 32135 LFP cells together using 0.3 mm copper strips. Cells are rated 15Ah. Today, I did a screen recording of the BMS app while doing full throttle uphill so I can observe the V sag. The pack already had 28 miles on it. With no...
  2. Z

    Cheap welding gun

    Anyone with experience with something like this and can share your experience? https://www.amazon.com/dp/B0BCDJYDDQ/?coliid
  3. Z

    Throttle response changed after increasing battery voltage

    My Fly 7 moped/motorcycle came with a 60V 20 Ah SLA battery (around 64 V fully charged). Since building a 22S 30 Ah LFP battery for it (around 73 V fully charged), it has become a different animal with much better acceleration, higher top speed and longer range. That's all good! However, the...
  4. Z

    Dot-3 brake fluid in E-moped?

    I thought ebikes with hydraulic disc brakes use mineral oil for brake fluid. I was surprised to find that my Fly-7 E-moped https://www.flyebike.com/product-page/fly-7 use DOT-3. How common is that?
  5. Z

    Small camera on full face motorcycle helmet

    Any suggestions for a small video camera (smaller the better) that can be mounted on a full face motorcycle helmet with epoxy or velcro? No drilling!
  6. Z

    Blew up Atorch DL24P battery tester

    I received my 180W DL24P a little over a month ago and It's been woking great testing LiFePo4 cells at cell levels. I went to test the capacity of a 22S 74V 20Ah LiFePo4 battery this morning. I heard a pop with a spark when I hit the Start button. I had cutoff set at 55V (2.5V/cell), discharge...
  7. Z

    Kapton tape

    I bought a 50 mm wide x 30 m long roll of Kapton tape from Aliexpress for $6.39 https://www.aliexpress.us/item/3256803012935630.html?spm=a2g0o.order_list.order_list_main.29.282a1802pWi9Ha&gatewayAdapt=glo2usa Just gave it a soldering iron test (25 W iron) and it melted immediately upon...
  8. Z

    Device to shut off charger at a pre-set voltage?

    Just found this $5 device https://www.aliexpress.us/item/3256806764600243.html?gatewayAdapt=glo2usa which may do what I need (shut off a battery charger when it reaches a pre-set voltage). If it works, will make charging your battery to 90% (or any %) possible using any charger. Just need to put...
  9. Z

    Anyone running DIY LiFePo4 packs w/o a BMS?

    I'd like to learn more about your experience. Do you have a thread on it?
  10. Z

    Do you ride your ebike w/o assist for aerobics?

    Before I got into ebikes, I rode an acoustic bike for exercise. Now that I have 2 ebikes, I seldom ride the acoustic bike anymore (16 lb Specialized Carbon Fiber) and can feel the decline. 48V factory Arrow 9, 500W rear hub PAS, 26", 6 spd, 75 lbs 48V Raleigh M80, 500W TSDZ2 mid motor, 26", 8...
  11. Z

    Considering buying a used 60V 45 Ah Lithium battery. How to test standalone?

    Someone is selling a used 60V 45 Ah factory Lithium battery for my moped. I am considering it but won't be able to test it on my moped. He sent me a video probing the output with a DVM and it read 67.2V (with no load). I have a 1400 watt heater coil from a drier or dishwasher with a resistance...
  12. Z

    Ebike weight

    What's the weight limit of your ride that you wouldn't mind carrying up a flight of stairs day in and day out?
  13. Z

    Who else has issues jumping in/out of gears on their mid drive rear cogs?

    For 500 miles, I had a TSDZ2 in a an old 1987 Raleigh Mtn Tour Seneca with 6 spd freewheel and the rear cogs worked well with no issues. A few weeks ago I moved the mid drive to another old Raleigh (2000 M80 w. very little use- practically new). It has a freehub 8 spd cassette and the bike jumps...
  14. Z

    Interesting $159 dual suspension bike on Aliexpress free shipping from US

    In the specification, frame, fork and rim is steel. In the description, frame is aluminum so who knows which is correct. Would some of you take a chance on buying one? I just moved my TSDZ2 mid drive from a no suspension to a hardtail. Me not interested ATM.
  15. Z

    Is this tire still good or ready for the trash?

    I bought 2 new 26 x 1.95 Fincci Fincci Slick 26 x 1.95 53-559 Foldable Road Tyre - Buy in Online Shop to replace the horrible 26 x 2.0 knobbies that came on my Raleigh M80. I heard some squeaking noise and found that one of the brake pads was rubbing on the tire which worn through the entire...
  16. Z

    Is 7.8 wh/ mile good on an ebike?

    I charged the 48 V battery on my TSDZ2 mid drive Raleigh Mtn Tour Seneca last night with a Kilawatt power monitor and measured 0.290 Kwh consumed. The bike had done 37 miles from full charge @ 54.4 V, dropping to 46.5 V after 37 miles (per KT-LCD3 display). That works out to 7.8 wh/ mile (a...
  17. Z

    Trail cam to catch dog walkers

    I am tired of picking up dog poop in front of the house. Signs I out up "Please pick up after your pet" does not help. I am thinking of getting a trail cam such as Amazon.com Anyone have one? Does it give you an alert on the phone when it detects someone walking by with their dog?
  18. Z

    TSDZ2 I want to add brake cutout

    I have around 400 miles so far on a TSDZ2 conversion on my Raleigh Mountain Tour Seneca. I would like to add brake cutout switches to the existing brake levers. I have tiny magnetic reed switches and magnets from prior projects making float switches that I can use on the brake levers so parts...
  19. Z

    How do I go about choosing a replacement front suspension fork on Arrow 9?

    My Arrow 9 weighs 75 lbs, has 26 x 1.75" tires. I think the forks are shot and not a very good when new ($140 for new factory replacemnt). How do I tell if it is coil, hydraulic or air? Anyway I want to replace them w/o spending a lot of money since it's an old bike. Just want to improve the...
  20. Z

    Drilling 1/2" holes in Bafang cranks to reduce weight

    Just got a set of 170 mm Bafang cranks. weighs 438 g (0.97 lbs). If I drill a bunch of 1/2" diameter holes spaced 1/2" apart along it's length, I may be able to reduce the weight by about 0.2 lbs. That should not weaken it right? Anyone done that?
  21. Z

    Help me choose a 48V battery for a TSDZ2 mid drive conversion

    I am currently using a 48V 7.5 AH Lithium battery from a Jetson Haze folding bike in a TSDZ2 (48V 500W motor) mid drive conversion. On the Haze, the battery will run 17 miles full throttle which meets Jetson's spec, even though when fully charged, it reaches only 54 V, not 54.6 V. Does this...
  22. Z

    Is it feasible to put a mid drive motor inside the bottom bracket?

    Hasn't that been done by pro cycling cheaters?
  23. Z

    Shelf live of Silicone (RTV) after opening

    When you need RTV, have you run into one that's been opened sitting in your tool box for a while (months/ years) but the stuff inside has cured so it's useless? That's happened to me quite a few times. This tube is at least 3 years old and is 1/2 full. The stuff inside is still fine and flows...
  24. Z

    Broken TSDZ2 motor casing rebuild

    Finally got a new TSDZ2 motor casing in the mail a few days ago. I've set up a work space next to my computer so I can reference videos and photos to help me put this thing back together. Glad I brought the casing to a LBS with a bearing press this morning to install the new needle bearing...
  25. Z

    Looking to replace 60V 20 AH lead acid battery

    I bought my Fly 7 moped new in Dec 2021 and have since put 1800 miles on its 60 V 20 AH lead acid battery. I took these measurements today: Fully charged 66.5 V. @ full throttle it sags down to 55 V with a draw of around 34 amps per my clamp ammeter. Does that sound typical for a 3 year old...
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