Recent content by harrys

  1. harrys

    Replacement Controller question. Have removed this faulty item from Elise folding bike and cant find a replacement with same pinout. The listed model

    Unless that writing on the controller is in chinese, you're in good shape because the connectors are listed. Buy a decent controller that comes with a wiring diagram, like most Kt controllers, along with a matching display, and it shou;d be easy to reconnect a new one. And if it is in...
  2. harrys

    Good Installation of Torque Arms?

    Those look like RST suspension forks. Living double dangerously if true,
  3. harrys

    Controller and LCD help

    I've bought that throttle unit just to get the voltage display, except mine had a red button instead of a key switch. If the ad says it has a throttle, then it's likely the wrong picture. The throttle arm would snap in on the right side, with a spring to tension it. What confuses users about...
  4. harrys

    AKM100

    Today I discovered the drawback with my 25A controller. It runs about 140-150W in PAS 1, vs about 100-110W on my 20A model. Felt good, but I kept outpacing my wife. While waiting for her to catch up, I dialed C6 down from 10 to 7, which makes it a 20A controller again. When I get a chance...
  5. harrys

    Motors jerks at 14 mph with sine wave controllers

    Thanks daniel. I had done the reset. After some more testing of my various ebikes I conclude that all my sine wave controllers do it. Slowly raising the throttle past some intermediate speed causes a blip where the motor noise changes. On my video, wiith only a bare motor, you see a speed...
  6. harrys

    Motors jerks at 14 mph with sine wave controllers

    I tried this with two different motors. Both jerk around 15 mph under throttle, the speed drops to 13. From there, it will accelerate again and not do another further jerking unless I stop it and restart. It seems to be associated with both my KT 20A and 25A sine wave controllers. It doesn't...
  7. harrys

    KT48ZWSRM-HY02L - characteristics?

    I have to disagree about all square wave controllers being sensorless. I can find all kinds of square wave controllers on ebay (USA) with Hall connectprs. I understand PSWpower only shows sensorless square wave boxes with torque simulation. Yes, I agree anything with only three motor wires is...
  8. harrys

    Help with SWXH and KT36 controller

    Hi vfr400, appreciate the LCD4 manual, but that particular one doesn't discuss the L parameters. They are in this link. https://cdn.shopify.cn/s/files/1/1430/3254/files/KT_LCD8_DISPLAY_USER_MANUAL_12676e67-7c33-4036-b255-78a4ac6beed2.pdf?v=1589875045 Want to keep L2 =0 unless one has a really...
  9. harrys

    Help! Swytch Kit - Big Rolling Resistance - Xiongda, AKM hub - checking/help

    The space between the screw holes on a disk brake rotor is 45 mm, so if I :compare that distance on the mini-me video, we;re looking at roughly 90mm between the spoke holes on the flange,far smaller than my Q100/AK100' at 108mm.
  10. harrys

    Help! Swytch Kit - Big Rolling Resistance - Xiongda, AKM hub - checking/help

    My Q128 is roughly 128mm beteen opposite spoke holes in the flange, My AKM100 amd Q100's are about 108mm with the same measurement. Wouldn't a Q85 and Q75 be closer to 80-90 mm? And for the OP, one of my Q100's will take 12 seconds to spin its 20" wheel down from 20 mph. Another will take 7...
  11. harrys

    Oh I seem to have messed up!

    While this has nothing to do with stressing aluminum. as an owner of several folding bikes, strength of welds has been a concern. I hadn't heard about the folding Treks, but Tern had a recall several years ago. Bad quality in welding? I'm not a mechanical guy, but it would seem some gussets...
  12. harrys

    AKM100

    I have used an external one several times. Twice when the motor didn't have a sensor and once when the internal sensor failed. WHat is odd is that when I used the LCD3, the speed would be stable when coasting, but sometimes jitter under power, almost like the controller was reading the...
  13. harrys

    AKM100

    It's always the nut behind the wheel that breaks a vehicle. My nutty days are far in the past. Maybe.
  14. harrys

    Oh I seem to have messed up!

    I thought the Rockhopper was alloy frame? Newer ones anyway,
  15. harrys

    AKM100

    Thanks for the caution! We're slow riding though. Average speed is under 12 mph, these being 20" folders ridden by seniors. The AKM already has 2076 miles on the 20A controller in 2020. The Q100h's are from 2017, and have about 2300-2400 miles over that time.I did wear out the pawls on a DNP...