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  1. E

    Batteries in series question.

    Thanks all, on the 7v side I have a total of 8 cells (3.7v 2.6ah ) and the configuration will have 2 series 4 pairs totaling 7.4v 20ah along with a 2s 20ah BMS. On the other battery pack I bought a 48v 20ah battery from CAO MM, so I wanted to experiment connecting them in series. Both packs...
  2. E

    Batteries in series question.

    Can I connect a 7v battery in series with a 48v lithium battery ? These both having the same cell types 3.7v and 2.6ah ? Both battery packs have 20ah.
  3. E

    Throttle or Controller Puzzle

    Thanks for the response. To answer your first question, yes the throttle was working for at least 6 months and it just stopped. I also opened the controller to perform a continuity test across all 3 throttle wires, they all Beep with good continuity also tested for shorts - testing mosfets, all...
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    Throttle or Controller Puzzle

    Hi everyone, wondering if you can shed some light on an issue I have with my main ebike controller that is affecting the throttle. 1. I Tested 2 seperate - 3 wire throttles (red, black and green wire). Basic cheap throttles. 2. Both throttles work using a seperate controller. They both rotate...
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    Is there hope ?

    Ok here is the update - I couldn’t stand being down not able to ride, so while I continue my search for a hub cover, in the mean time, I welded the broken hub using my Arc welder and 4043 aluminum electrodes. See pic. I’ve been testing it for a few days although not 100% perfect - I’ve been...
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    Is there hope ?

    I tried calling Voilamart and to be honest they are no help. They won’t even sell the hub - they only sell the entire kit.
  7. E

    Is there hope ?

    It’s all one piece that cracked. The color is because I used varnish sealant for water sealing. Anywho, I found a few vendors on AliExpress that offer inexpensive covers but seems Voilamart had a special built - and I can’t find one that matches close to the diameter dimension...
  8. E

    Is there hope ?

    Thanks all - yes checking several sources for prices, it comes down to one conclusion, which is to buy new. The only other suggestion someone offered was to have it 3D printed as they use some material that is as strong as aluminum. But I have zero experience with that.
  9. E

    Is there hope ?

    Thanks all for the guidance. I did visit the Voilamart website but they don’t sell individual parts everything is a kit. This situation brings some perspective with my next hub motor purchase, where I won’t mind paying a bit more but they should offer me some individual parts to properly repair.
  10. E

    Is there hope ?

    My son and I were riding it around the block and of course we should have used the kick stand but it the bike was laid on the driveway. And my other relative reversed his SUV and ran over the back wheel. Wasn’t sure if I could weld it since I do have a welder and aluminum rods.
  11. E

    Is there hope ?

    Thanks for the info- I didn’t think there was a parts needed section. Will check it out. This is a 2 year old 48v 1000w Voilamart, if I can’t find the plate cover then I will probably just sell the motor. Again thanks.
  12. E

    Is there hope ?

    Left the bike laying flat and relative reversed and drove over it (see pic). Only one side of the motor cover cracked - tested the stator and it’s all good. Does anyone know a source where I can purchase just the motor case. Else I thought of welding with 4043 Aluminum Rods
  13. E

    Upgrading Magnets in Hub Motors

    Wow!! you guys work for NASA or what ? 😀 some of this magnet stuff is way over my head, but here is my situation, due to hall issues, I opened my 48v 1kw hub motor (Voilamart), which is only a year old and I found a rusted mess inside the hub, magnets unglued and stuck to the stator. The one...
  14. E

    E-Bike Tester Hall Sensor Diagnosis

    Thank you Calab, I ordered the spray on from Amazon and have JB high temperature weld to ra-attach the magnets. Was unable to find the exact magnet size dimensions on eBay so need to custom order. So will se how it goes.
  15. E

    Voilamart Controller Mod

    Perfect point amberwolf, I should have taken some pics along the way, however i don’t think I mentioned it was easy as it took me a few hours of work. Also my go-in was with the expectation that I was going to ruin the controller and by sheer luck it worked. As I mentioned? the main two...
  16. E

    E-Bike Tester Hall Sensor Diagnosis

    Thanks everyone - just an update I ended opening up the motor. Invested in a 3 jaw gear puller. I did find that after continuity testing it was the red power cable that somehow broke and I had to solder it. However that was not the end of my woes, upon opening the motor it was rust galore and...
  17. E

    Hub Motor Magnets

    Hoping some one can help me, I had to disassemble my Voilamart hub motor given one of the halls was bad and the motor was making weird noises. Upon opening the motor. I was surprised to understand how this motor was still working. I found a lot of rust and some of the magnets had come lose and...
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    Voilamart hub motor - intermittent fault - whining noise, loss of torque and shuddering at low speeds [hall sensor?]

    Hi Jgoose where you able to replace the Hall sensor ? I just started experiencing the exact same symptoms and when I connect an e-bike tester my green hall light stays lit, which I think means I have an issue with that Hall sensor. . I have the Voila 1000w rear wheel kit..
  19. E

    E-Bike Tester Hall Sensor Diagnosis

    I have my hub motor often struggling to take off, and even it it takes off when pressing the throttle to say more than 800w (based on SW900), it jolts and the controller cuts current then it resumes. . When I use the e-bike tester the Green Hall connection remains on all the time (see pic)...
  20. E

    Voilamart Controller Mod

    Just a quick update, I was successful on mapping the wires on the Non-LCD Voilamart1500w controller and once done, the Non-LCD controller works like a charm controlling my 1500w Violamart hub motor and everything displays well on the SW900. . IT WORKS !! I started with 5 wire connector going...
  21. E

    Voilamart Controller Mod

    Has anyone attempted to convert a NON-LCD 48v 1500w Voilamart Controller to be compatible with the SW900 LCD.. I do have a separate 1500w LCD controller and when comparing both, I see it's pretty much the same circuit board, so I figure it would just be a matter of removing the old wires and...
  22. E

    Voilamart mystery

    Its coming up to 2 years now. I’ve never opened a hub motor so will have to educate myself a bit. I don’t think there are repair shops for these (not sure).
  23. E

    Voilamart mystery

    Thanks for the prompt response. I forgot to mention that initially I thought it might be bearings so I replaced the freewheel and even did some grease maintenance on the bottom bracket with new bearings and even a new derailleur. But as stated the issue only happens intermittently either when I...
  24. E

    Voilamart mystery

    Voilamart 1000w rear motor w/1000w controller and 48v 20ah battery. Condition 1 : when approximating the top speed of 30ish MPH, I hear a rubbing sound similar to the wheel hitting the frame but I inspected the wheel and even switched the kit to a different bike and same result - so it seems to...
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