Recent content by RTLSHIP

  1. R

    I think my scooter lead acid batteries died, I want to go with Lithium

    I would go with lithium. less weight and greater range.
  2. R

    Growing pain with ebikes.

    I think that is more like another tax scheme that a public safety concern
  3. R

    Is there a need for 2 torque arms

    The front fork should be steel w/ a front hub motor. I don't know whether fork suspension vs solid fork matters. A second torque arm adds more steel. It might give peace of mind.
  4. R

    Growing pain with ebikes.

    The problem with some lithium batts seems charging or discharging related. overcharging and over-discharging. So the charger quality and supervision is paramount. I'm using Amercian made LG brand INS and keep it between 48 and 53 v on a 14s pack.
  5. R

    48V vs 72V

    can you overvolt the yescom kit?
  6. R

    Hey! I've built a dirtbike using Votol em200 2sp + qs138 90h motor. Finally, after almost a year I've finished the conversion. I'm running the default

    I don't have much experience tweaking but I can say that many motors do not live up to what the manufacturers/vendors claim. The same is true of battery packs and controllers. These things can be over hyped. The same with car tires and many other products. Is the motor bike extra heavy?
  7. R

    Was working made a u-turn and now it doesn't

    I've had battery packs cut out and all I did is unplug power and reboot. This could be a sign of a low amp bms or riding it too hard for too long. Some of those Chinese packs (and USA packs) work OK but don't live up to their rated AH claims.
  8. R

    Lyen 12Fet EU

    EU is Europe?
  9. R

    BMS replacement questions

    Not true in this case. He sells these 14s with or without BMS. I asked him about it and he suggested that you can get by without it if you don't deep discharge etc. It depends on your usage. These cells are made in USA , maybe San Diego. Green Horizon. Vendor has 100%
  10. R

    BMS replacement questions

    I see an ebay vendor selling 14s6p without any bms. I wonder if buyer is suppose to attach one or can just ride without. it takes over $100 of the pricetag
  11. R

    YESCOM 1500w Motor Problem

    I got about the same speed with a lifepo4 pack @ 52.8v. But my kit is called a 1500 W 48V. I don't think buying a 52 v lithium ion will change that even if it is a 25 or 30 ah pack. My life packs are 20ah and 12 ah. 12 ah cuts out if running fast and far
  12. R

    BMS replacement questions

    What happens if you remove or disconnect BMS and just run it? Will it charge up almost balanced then? I say that because a bms may cost more than older pack is worth. And bms swap may fail.
  13. R

    48v 1000w Motor with 60v 20ah battery.

    I've never had overheating problems with overvolted brushless motors. It did happen with an old brushed motor- a magnet got loose and brushes worn down quickly. So from 36v to 48 or 48v to 60 is not that much, but your controller must be compatible. A rough guide would be to set it up and feel...
  14. R

    YESCOM 1500w Motor Problem

    You guys got a ton of snow from what I saw on the news today. Anyways, the Yescom customer service was pretty good to me and answered several questions, but the noise your motor makes seems normal to me. I've owned 3 brushless motors and they all make noise when accelerating.
  15. R

    YESCOM 1500w Motor Problem

    Will it run faster with halls disconnected? If your bike goes 30 mph or more I doubt it is the bearings. You should hear bad bearings by pedaling with motor off
See more
Back
Top