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  1. S

    Legality of mid drive kits on EU

    Software is part of the machine, just like hardware and firmware. As long as you configure it to 250w on the road, it should be legal.
  2. S

    New "TSDZ2 Torque Sensor Central Motor"

    A possible guess is that the big steel gear just under the drive side motor cover is grinding the motor case. It might have developed axial play due to the helical teeth used. There was a long discussion about this matter in the forum. You don't get this noise in walk assist since the torque is...
  3. S

    TSDZ2 total loss of power - cannot figure it out

    Looks more like a battery issue, did you measure battery voltage when the motor dies?
  4. S

    Figuring out if my TSDZ2B is 500W or 750W

    There's no difference between the 250w, 500w or 750w rated motors. The only two versions of motors are 36V and 48V regardless of power, with the only differences in winding count and wire thickness in the stator. The power rating is restricted by firmware.
  5. S

    GNG / CYC X1 Pro 3000w

    Thank you and now it works! Just happened to ignore that :oops:
  6. S

    GNG / CYC X1 Pro 3000w

    Hey guys, I just installed my new CYC X1 Pro Gen 2 with the BAC855 controller today and tweaked a little bit with the "CYC MOTOR (BAC)" app, and found the motor won't save my settings after shutting off. Is this usual or I missed something? For me the foremost disappointment is not enough pedal...
  7. S

    TSDZ2 total loss of power - cannot figure it out

    Looks more likely with the battery or connectors. I would suggest check for a loose connection or battery over-discharge protection first. If your battery is getting old, its voltage drops more than usual upon a high discharge current, which triggers the protection either in the battery or in...
  8. S

    Mid drive motor pedal sensor failing

    How exactly is the intermittency of power delivery? If it is like sharply on and off then I'd check for a loose connector first. If the torque ramps up every time it comes back, it's more likely the torque or pedal sensor.
  9. S

    tsdz2 36v actual power ?

    The 36V motor does have thicker wires. I had physically inspected the two versions of motors I own and can confirm the wires in the 36V windings have a larger diameter than those in the 48V windings. Also I had been running both motors under 52V battery at 16A and did not find the 36V motor...
  10. S

    tsdz2 36v actual power ?

    With the same current the 36V version definitely outputs less power than the 48V version. But as the 36V motor has thicker wires and fewer turns, there is fewer resistance. So won't the 36V motor be able to handle a higher current before overheating?
  11. S

    New "TSDZ2 Torque Sensor Central Motor"

    Running into new problems following the pulverized brass gear. I cleaned everything up and put the blue plastic gear back, testing out its input power was reaching 140w spinning with empty load. Normally this should be within 50w as I measured before, by removing the chain and hitting throttle...
  12. S

    tsdz2 weird noise after replacing nylon gear bearing

    Did you check the gear meshing on the drive side? I'd make sure every tooth on the small axle gear was in perfect shape and not spinning loose or grinding anything.
  13. S

    TSDZ2 Newbie with lots of basic questions -

    That heat sink alone is not enough for heat shedding. There's significant heat resistance between the laminations and the aluminum motor base. That said, you can shortly hit 750w and should be fine if you keep your average below 450w. If you'd like to start hot rodding, feel free to find a...
  14. S

    Hardware temperature control tsdz2

    Just measured them today. My "middle brace" is 162mm long, 33mm high and 1.2mm thick. My "outer brace" is 196mm long and 29mm high, and has a trapezoid cross section, being 0.4mm thick on one side and 1.3mm on another. But again that's rough handcraft and the motor casing is known to have...
  15. S

    New "TSDZ2 Torque Sensor Central Motor"

    Yeah I agree that a CYC mid drive or an additional hub motor is a better choice for me. Was just experimenting with the tsdz2 to see whether it would make it to perform like a real 750w motor and now the conclusion is yes, but with suffering reliability. Satisfied though. FYI I posted my...
  16. S

    New "TSDZ2 Torque Sensor Central Motor"

    My brass gear was destroyed in about 1000 km, I wonder if this happened to anyone else before? I'm running a 36V motor with a 52V battery, and I improved the cooling structure this April so I could run the motor constantly at 850w since then. I cruise at 40+ km/h in most conditions and when...
  17. S

    Hardware temperature control tsdz2

    I built the following cooling structure with 1.6mm thick aluminum sheets. The only power tools used are an angle grinder and a drill. I selected soft 3000-series aluminum to ease the work. The first picture shows all the components. To make the curvature for all these components I cut the...
  18. S

    Help diagnose a Tongsheng problem?

    Are you getting slips when pedaling, like crank turns but chainring doesn't? This indicates the sprag clutch needs a replacement. Or are you randomly having pauses of output power? If this is the case, do you still hear the motor when the chainring stops? If the inside motor still turns but...
  19. S

    TSDZ2 Newbie with lots of basic questions -

    The so-called 500w or 750w versions have identical hardware if they are rated for the same voltage. Their stock firmware differ by restriction of wattage. With the OSF you can set the maximum battery current and motor current to control the wattage. This is reasonable since the wattage of a...
  20. S

    TSDZ2 failed in odd way, suspecting the controller?

    Thanks a lot you really saved me a whole lot of hassle messing up with the motor! It was a loose connection in the base rack of the battery, and motor was perfectly fine.
  21. S

    TSDZ2 failed in odd way, suspecting the controller?

    Thanks for your detailed explanation. The battery did bump off from its base and smash to the ground while I'm at 20+ mph several times due to poorly designed securing. Perhaps they got damaged from these and worsened enough in my last ride? I will go for some test rides with half and fully...
  22. S

    TSDZ2 failed in odd way, suspecting the controller?

    I know I have been posting so many TSDZ2 related questions but... My 52V TSDZ2 with 860C and OSF 1.1.0 failed again today, at a 2500km mileage. I left home with a full battery at 58.8v and things started to go wrong after riding for 20 minutes, when power delivery started to pause for short...
  23. S

    TSZD2 Controller

    Here's the fresh update. Don't trust even a comma from me saying this. My motor failed today 20km from home. Giving intermittent power at the beginning, then developed slowly and suddenly dead. Ruled out all the sensors and finally narrowed down to the controller. Not sure if this is the cause...
  24. S

    TSDZ2-necessity of the iron bracket on non-drive side?

    I probably won't go that far if I can get away by modifying the motor. For me, the last thing to touch is the frame since it's the most expensive and risky part.
  25. S

    TSDZ2-necessity of the iron bracket on non-drive side?

    Good point. But as the weight of the motor part is not huge (likely <1.5kg), shouldn't the flex be small enough to last for years? And do you have a link how someone broke the casing by not using this iron bracket? I can't find someone not using it on the web (as this part has too many names)...
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