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  1. AC9999

    Speed Issue On New Build

    It's a plug and play system so no way to reverse any wires but the 2 power ones to the controller. And those are fine. It came on a 26 and all settings are correct. It's a bad controller. FETS are now blown.
  2. AC9999

    Speed Issue On New Build

    I've also read on several other posts that it is probably blown FETs. I'm going to go follow through on that thought process first and see if it solves it. So does anybody think that the main issue in the first place was a single blown fet causing that half amp problem? Is the only way to test...
  3. AC9999

    Speed Issue On New Build

    They all were. First thing I checked was all wires and connections. But the motor has the resistance when plugged in so that points to blown fets. Right?
  4. AC9999

    Speed Issue On New Build

    I have a new one coming. Doesn't mean I can't work on this one too. Why does it bother you so damn much that I want to still work on it? You obviously don't want to really help in the repair so go bother someone else with your brilliant insight.
  5. AC9999

    Speed Issue On New Build

    Would this be a good replacement to go with between the current STP80NF70 68v 98A http://www.mouser.com/Search/ProductDetail.aspx?R=STP80NF70virtualkey51120000virtualkey511-STP80NF70 I have in there now that is blown and needs replacing and getting the 4110's? IRFB7734PBF 75V 183A...
  6. AC9999

    Speed Issue On New Build

    Could something as simple as a single blown FET be the issue in the first place? Could that cause a 50% reduction in speed and acceleration? Then the addition ones blew due to the mods. Any suggestions for replacements? Maybe from here...
  7. AC9999

    Speed Issue On New Build

    Well good to know it's not my motor for sure. I'm thinking the mod did increase the amps a bit but the underlying problem still existed so I couldn't tell. No increase due to whatever was damaged to begin with. The increase in heat then burnt up some fets? Sounds logical. But if my mods didn't...
  8. AC9999

    Speed Issue On New Build

    I also notice the hub wheel will not spin freely while connected to the controller. Battery not connected. I can feel the magnetic resistance trying to spin it. When I unplug the connector from the motor to the controller it will spin without resistance.
  9. AC9999

    Speed Issue On New Build

    Well that didn't work. It was running at the same speed and acceleration but couldn't get a read on the amps yet due to the crappy GT wattmeter not being able to function at higher volts. I ordered the watt' s up yesterday. Hoping that'll be better. Anyway after a few minutes of riding it seams...
  10. AC9999

    Speed Issue On New Build

    There are 5 PAS levels. Well 6 in you include 0 which is no assist. There is a difference between them so that is functioning correctly. Ok I did some soldering on the shunts after squeezing them together a little. I also beefed up the long run in back and the one behind the fets. They were...
  11. AC9999

    Speed Issue On New Build

    Really? Because nothing ever breaks and gets damaged or is defective right? I'm not saying i believe everything written on a sticker coming from china but hey everything we ride pretty much comes from there. You gotta sometimes take things at there word until you can prove otherwise. That means...
  12. AC9999

    Speed Issue On New Build

    Then I'd definitely have to say defective controller. I've never seen it hit 10A let alone 25A. Even with the above tests it only hit 9A. Any insight to the beefier controller I asked about? I think they also have a 35A too. If the 60A is too much I'll see if I can get em to upgrade me to the...
  13. AC9999

    Speed Issue On New Build

    Ok with the bike against the wall and riding through some taller grass with motor struggling a bit it went to a little over 9A. What does this mean? I took pictures of the inside of the controller as soon as I got it. I knew I'd have to see it for a date or board number or something. If I need...
  14. AC9999

    Speed Issue On New Build

    Do you see the image of the controller above? Clearly states 30a max. I have internal shots of the board as well if I need to post them. There is a quote above from teslanv speaking about this particular motor. He knows the Mxus brand very well. This motor is capable of speeds around 30mph with...
  15. AC9999

    Speed Issue On New Build

    I understand about P5. It's a visual thing on battery bars. Got it. Picture of controller below. Explains what I meant for 15a and 30a max. I'm in South Florida. Not too many hills around. But when I try accelerating through some thick grass at a slight incline and I feel the motor struggling...
  16. AC9999

    Speed Issue On New Build

    Ok let's try this. How can I, following the path of electricity through all the components, measure input and output with a multimeter to see where the loss or block of power is. We all think it's a loss of Amps reaching the motor correct? What should be the measurements coming from battery...
  17. AC9999

    Speed Issue On New Build

    That's just it though. It is a reliable motor from Mxus strait from the factory. Not ebay or amazon. The setup is a proven reliable system that yes like your first kit should hit those speed limits. The controller is a 30a max controller. Acceptable for this "higher end" well know name brand non...
  18. AC9999

    Speed Issue On New Build

    Everything is set correctly as far as max speed. (Although it reads 72kph even though its set to imperial, so 44mph) The KT-LCD1 does have the same style . functions as the LCD3 just not the higher advanced settings past the P1-5, no C settings accessible. Voltage is 48v on a 20ah Li-NiCoMn...
  19. AC9999

    Speed Issue On New Build

    Yes I've tried throttle and pas. Throttle gives me 15-17mph and pas on 5 with some hard peddling and wind at my back will top out at 22mph. So I guess the question is what's the issue with the low amps. At least now I know where the problem could be. Possible solutions? I know the P5 setting...
  20. AC9999

    Speed Issue On New Build

    I just joined but have been a long time reader. Thank you to all the well know members who seem to give the best advice in almost every post I happen to be reading. I've learned a lot. Ok now the details. My first build. 2005 Specialized Hardrock Sport 48v 1000w Mxus V1 motor with matching KT...
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