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  1. betarambo

    Lipo Cold Temperature Issues

    Time to tap the ES brain trust again... In testing my 26" Oset this weekend I had a lot of issues and realized too late that it was because it was so darn cold. I left the batteries in the bike, outside overnight. Ambient temperature was around 28 F most of the day and probably a lot colder...
  2. betarambo

    Best 26" Off Road Rear Tire?

    Can you guys give me some ideas on a good rear tire and perhaps a rim? I am putting 26" wheels on a 20" Oset. http://osetbikes.com/us/oset-bikes-en-US/oset-20-0-48v/ The bikes puts out about 5 kW and is geared very low (like 20 mph max with a 20" wheel) so traction can be hard to find in the...
  3. betarambo

    15C Zippy Flightmax Batteries Gone?

    I have a pile of these batteries for my kid's electric motorcycle (Oset). I decided to order another set but can't find them. I see 20C and 30C equivalents for decent prices but they are not the same size or weight as the old 15C. For the 6s1P packs I use I see: 15C 20C 30C...
  4. betarambo

    Trials Hub Motor for Two Wheel Drive?

    I finished my first build and the bug has stuck! I can't stop building electric trials bikes! My daughter is very happy with her hub motor trials bike. So I need a new project. A hub motor trials motorcycle for an adult would be rare. I haven't seen any other trials bikes with hub motors so...
  5. betarambo

    Solved! Can wrong hall/phase combo make motor spin faster?

    I know the title sounds lame but it got you to read the thread! :D I am connecting a Lyen 12 Fet to a Magic Pie II. I thought I had the right phase and hall combinations as they are documented on Lyen's site and they do make the motor spin. However, I noticed a vibration and grinding noise...
  6. betarambo

    Help Programming Lyen 12 FET

    It is a long story that has lead me to asking for your help so I will try to keep to just the details you need in order to solve my problem. :D I bought the controller and ran it for a while with no problems except that my motor had problems. Along the way I programmed the controller while...
  7. betarambo

    Magic Pie 3 Side Cover Reinstallation Tips?

    Hopefully this is a simple rookie question, but I fear it is not. While trying to get my MP3 sorted out I had a couple of instances of the motor not turning freely. It didn't feel mechanical. I figured I must have some sort of short in the phase wires. After finding nothing on the outside I...
  8. betarambo

    Build: Youth Electric Trials Motorcycle, MP3

    I guess it is time to start the big write up so here goes: Why I ride moto-trials which is a motorcycle sport that is like an obstacle course. Think tight turns, riding over rocks, logs, cars etc. and you are scored based on not putting your foot down and not going out of bounds. My daughter...
  9. betarambo

    MP3 Internal Controller, can you ID this part?

    I accidentily put 48V into one of the throttle hall inputs on the internal control on the Magic Pie III. This stopped the controller from spinning the wheel but the battery lights on the throttle still light. I took the controller apart and found a blown capacitor ( I think it is a capacitor, is...
  10. betarambo

    Popped My MP3 Internal Controller?

    I ordered Magic Pie 3 with twist throttle but got one with a thumb throttle. I called the dealer and he sent me a twist throttle but this one did not have the connector for the MP3. After talking to him and finding out that he was reluctant to send me the part I had ordered after getting it...
  11. betarambo

    Advice? Valve Stem Clearance on MP3 Tiny Rim

    It may be a crazy idea but I laced a 14" motorcycle rim to a Magic Pie 3 hub motor. This rim is smaller than a 20" bicycle rim. The hub is 12" outer diamter and the rim is 13" inned diamter. I end up with just under 1/2 an inch between rim and wheel. I got short spokes made, used Belleville...
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