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  1. M

    2 Speed Xiongda hubmotor

    Nice looking tool, I did open mine when it was fairly new and since I put grease on the threads, but it's still hard to remove. What I did was find a longer screw/bolt that fits, and put a few nuts on it as washers so it protrudes about a 1 cm and tighten it in place, then sitting the wheel...
  2. M

    2 Speed Xiongda hubmotor

    Well, I finally retired my XD 2 speed, finished with around 15000km / 8 years on it, with the last 4 or so no longer doing a long commute. The teeth got chewed up again on the plastic sun gear and I have no spares. It had become noisy (clacky sound due to the mechanism's bearings having too...
  3. M

    2 Speed Xiongda hubmotor

    The previously supplied link still works; but if it never powers on, I think it is stuffed, or you have a loose wire. http://www.szktdz.com/upload/file/20140913/20140913155038_92748.pdf
  4. M

    Multistar High Capacity 6S 16000mAh

    Yeah, What parabellum said, adjusting the target voltage isn't the same as calibration. I was watching it closely yesterday and initially voltage read is correct but as it ramps up amps to the full 38A, it only has to go to about 3A before the voltage drops rapidly, by as much as .3v (for...
  5. M

    Multistar High Capacity 6S 16000mAh

    No calibration on this charger that I know how to access...Good call, I didn't even think of trying LiIo option with it's 4s taget voltage of 16.40v instead of 16.80, Which is ideal in this situation, also I can adjust the LiLo cell target anywhere between 4.08 and 4.20 (Lipo is 4.18 - 4.30)...
  6. M

    Multistar High Capacity 6S 16000mAh

    My new batteries are doing great, now nicely bedded in so they charge up nicely balanced now. However my charger keeps going over-voltage while charging.... Not sure if this is only an issue on the 4s which was not an issue on 6s or the charger is stuffed and is quite possibly a cause of my 6s...
  7. M

    2 Speed Xiongda hubmotor

    My experience with that 12s 44v lipo on the XD 36v controller it was slightly too much voltage and would cut out after a high load (cresting a big hill) for the motor though shouldn't cause any issues. So it really depends on controller that one had 50v capacitors but cut out above about 47v
  8. M

    2 Speed Xiongda hubmotor

    Yeah I got a new battery sorted, my motor is running nicely still, but as I said I now have a rattle in low like a missing roller spring, not bothering me much, the other sounds has calmed down now also. I went with a Hobby King MultiStar 16Ah LiPo again, these are a whole different category of...
  9. M

    Multistar High Capacity 6S 16000mAh

    For comparison I did an endurance test on my 3x 4s 16Ah and yes, just below 3.6v under load they fall off the cliff really fast I was riding @ 43v then 500m later 42v... I limped home to about 41.6v at rest with these cell voltages; 3.44,3.45,3.47,3.53,3.45,3.61,3.64,3.41,3.40,3.37,3.46,3.37 -...
  10. M

    Multistar High Capacity 6S 16000mAh

    Yeah they will still be great for fast 'ball park' checking of my cells, glad I am not reliant on them for balancing though, mine only measure to the nearest .01v do yours go to .001v? Only once I fully charged did I get one of the BM'ss out by the .04v When I measured with volt meter all...
  11. M

    Multistar High Capacity 6S 16000mAh

    Aren't those stats highly dependent on how many watts you drew down?... as in If you already got a full 10Ah at that point, then it could indicate 2 cells that are over spec? That and are you getting a 2nd opinion on the voltages?... my Turnigy Mega 1000W Charger randomly over reads cells, and...
  12. M

    2 Speed Xiongda hubmotor

    Good to hear bigoilbob, The gradual amp-up is why they chose sine wave controllers pretty early on I believe. I certainly got better range, or rather less Ah used for my standard commute consistently with the thin ptfe in the clutch, will be good to see if it pans out simmilarly with you. I am...
  13. M

    Multistar High Capacity 6S 16000mAh

    Yeah sounds good, and I'll probably go that way if I get a BMS, but right now it's gonna cost me more than the batteries for a genuine one and only 5.95A, when I already have an pricey charger (but max 8s) Does any Power supply that states CV/CC automatically ramp down at the end too? The...
  14. M

    Multistar High Capacity 6S 16000mAh

    Nope, it is as you say, I charge at 6s and discharge @ 12s (and planed to charge 3x4s in parallel with the new kit) I just hadn't heard or read anyone (whom accepts HK Lipo with no BMS as acceptable) suggesting this isn't a good way to do it, or that it is the Worst, as you said, so wondered on...
  15. M

    Multistar High Capacity 6S 16000mAh

    I am not sure what you mean by breaking packs? I had 2 6s packs that run in series on the bike, to 'bulk' charge - I plug the main outputs (2) in parallel into the charger and charge, not balance up to the minimum I can (50.2v) then I had to remove them from my bags so I can reach the balance...
  16. M

    Multistar High Capacity 6S 16000mAh

    I just ordered 3x 4s on special + had a 10% off code so almost 50% off, too hard to resist, but this time I also got a bag so I can house on my rear rack instead of in pannier bags (one reason I didn't balance often enough as I had to pull them outta there) Very true re: distribute losses, I...
  17. M

    Multistar High Capacity 6S 16000mAh

    That's it; replace a cell or remove one but how long will the remaining last? A bit more trouble wiring 4s and no longer symmetrical for my pannier bags, but 50% cheaper than the 6s. The 5200 I'd need 6 to get the range, so that'll be even more wiring. True that 200 cycles is acceptable and for...
  18. M

    Multistar High Capacity 6S 16000mAh

    Yep, mine were the same all perfect cells when new and got about 7500k (4600miles) of great performance up till the failure, now that 1 cell can't make the 36k/22miles commute whereas 45k/28miles was max range on my setup while healthy(stopping @ 3.4v/cell) Unfortunately the cost of a proper...
  19. M

    Multistar High Capacity 6S 16000mAh

    Yeah, if anyone else wonders - little over a year and I have had the same, 6th cell on my 2 packs is now Low voltage with one being drastically so. After my standard commute all cells nice at about 3.7 ish but then 6th cell will be about .04 lower on the bad pack it was as 3.0 yesterday (.7...
  20. M

    2 Speed Xiongda hubmotor

    700c Wheel 32 Tyre from http://www.bikecalc.com/wheel_size_math so about 2m per RPM Rim ↓ Tire Rim (iso) ↓ Tire ↓ Wheel ↓ Circumference of Wheel mm ↓ 28inch 32 mm 635 32.00 699.00 2195.97
  21. M

    2 Speed Xiongda hubmotor

    You have the Lishui too right? which from all accounts shifts noticeably faster than the KT (by faster I mean the second or two it take to stop and change direction) My 48v KT is a bit faster than the 36v but still too slow, as I lose up to 5kmh from the shift itself, which is one reason I...
  22. M

    2 Speed Xiongda hubmotor

    That could be quite true, I always manually downshift @ about 20kmh when it starts to labour, if i left auto on it would go down to 15 or less before shift, which is when it is really struggling. For reference, on flat it would auto upshift about 20-21kmh and on moderate hills holds about 18-19...
  23. M

    2 Speed Xiongda hubmotor

    Wow, you totally shredded it! I'd at least rotate the drive enough to check each tooth in the plastic planetary gears, make sure they are sound still (they seem to be where most of the failures occurred) or take it off anyway as you'll likely want to clean and Bonnie might give you a new set of...
  24. M

    2 Speed Xiongda hubmotor

    I think i originally had slight noise at certain speeds, more in low. pretty quiet compared to my previous single speed, however I just serviced it with a clean and new lube and it's making a new rattling sound (like maybe one spring from the high speed rollers fell out?) + the slight sound at...
  25. M

    2 Speed Xiongda hubmotor

    I use the Wet PTFE WD-40 and it seems to work very well, it's not much different to normal WD-40 but _should_ be more slippery from the teflon (PTFE) It has been significantly better than a conventional style axle grease though, which made it quite sluggish. I haven't opened it for thousands of...
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