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  1. R

    what size nut on mac 12t

    Hi, I hope this is not a dumb question. I ordered a mac 12t motor on advice from this forum and laced it to a 26 inch fat tire rim. The drop outs on the front fork are so wide there is a huge gap between the motor face and the fork. I currently have a stack of washers in there and it seems to...
  2. R

    help identifying lyen controller wires

    Hi all, To make a long story short. I disconnected my lyen controller and lost the lables. Can some one tell me if my lables on the pic are correct? I am only concerned I dont get the red wires from the hall sensor and the red fro the throttle switched. Thanks!
  3. R

    help trouble shooting 8fun motor and lyen controller

    Hi, I hope someone can help me as I am stuck. I have a 350w 8fun motor with the stock controller Im assuming this is the same as a bafung motor and controller. It is running 36v 8amps from a bottle battery. Everything was working fine when it suddenly stopped working. I took off the controller...
  4. R

    throttle replacement wires

    Hi, I got a new twist 3 wire throttle. Will I damage my controller batteries etc, if I hook up the wires wrong? Or will it just not work. If it wont damage anything I'll just go trial and error, if it does what voltages should the three wires from the controller be? I read 5v somewhere but am...
  5. R

    help with new freewheel and chainring

    Hi, I've been enjoying my gng 2 450w set up on my bike so much I think I am breaking the freewheel and chainring. While doing maintenance I noticed I can wiggle the whole chainring from side to side. Everything seems tight so I'm assuming its wearing out. I read through the pages of gng...
  6. R

    adding lipos for more capacity

    Hi, Thank you first for all the great advice. My current battery setup is 4 6s1p 5000mah wired in series then parallel. 10amps 48v Can I add 2 more lipo packs in parallel if the voltage is the same BUT the mah is lower? IE 3000mah for each new pack. I have some room in my battery box and would...
  7. R

    fat sand bike conversion

    Hi, I hope someone can give me some advice. I finished my gng 450 mid dirve on a giant fs and love it! I miss riding on the soft sands here though. I am thinking of starting another project on my current fat bike. Its a fat sand bike e monster with a 500w fun8 motor. Fatsandbikes.com. The front...
  8. R

    Thunder 1220 and power supply question

    Hi, I have a thunder 1220 12s charger running off a radio shack 13.8v 25 amp power supply. The power supply is probably about 7-8 years old but works fine. Do I have a limit on charging amps to my 12s 10000mah battery? I was charging at 5 amps and it seemed fine, I'd like to take it to 10 amps...
  9. R

    Put back 1.26 amps what does this mean?

    Hi, Hope this isn't a dumb question. I took my bike out this afternoon 1.5 mile up hill muddy trail. Rode about 20 min up then back down. I took apart my 4 6s packs running 50.1 volts fully charges 6s2p. Each battery took 1.26 amps when I recharged them, about 24 minutes, final voltage was 25...
  10. R

    Lipo charging and balancing help

    Hi I did read the various posts on charging and have charged lipos and balanced in the past but want to make sure my set up is correct. I have 2 6s1ps soldered together in series and another 2 6s1ps soldered together 5000mah each. The two packs are connected together in parallel with solder...
  11. R

    Lipo battery question

    Hi, I have read through the battery section but Am still a little unsure about my setup. I have a gng mid mount 450watt motor with the stock gng controller. From what I read the c rating of a lipo times the amp capacity is the amp maximum burst? What is the normal discharge? I am using 4...
  12. R

    wiring safety recomendations

    Hi all, First of all thank you for all the input of which batteries to use. I decided on using 4 6s1p zippy 5000mah 20c because of the small triangle space and light load post rack. I am planning to wire 2 in series then in parallel for 44volts. The batteries will be connected to each other...
  13. R

    lifepo4 or lipos

    Hi all, My first post on endless sphere! A quick background of myself. Im a doctor in Hawaii and have been pretty active mountain biking for many years, but a bad back and shoulder limits my ability. I am trying to build an ebike from a gng-2 450 kit 48v, that is being shipped now. I have a...
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