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  1. U

    Battery List

    Prices have been updated.
  2. U

    1970 Yamaha R5 "Rust Bucket" Build

    Oh boy.... Ok so honestly I just forgot about this post for about a year.... HAHA! ....I've got some catching up to do... 4/16 Finally got the motor mount finished and the motor mounted up I noticed the motor was crooked here, I did end up straightening it up 6/16 Started wiring up the...
  3. U

    Battery List

    Prices Have been updated. Sorry for the delay, been an insane week... The multistar 4s 10AH is on a good sale right now.
  4. U

    Battery List

    Updated prices 11/22/16 This is a list of batteries, 18650, LiPo, LiFePO4, SLA, and others. I made this for a quick comparison of batteries and prices for curious people or anyone looking to buy. Includes links to batteries and available data sheets. If you'd like me to add a battery include a...
  5. U

    1970 Yamaha R5 "Rust Bucket" Build

    11/23/15 Not too much has been happening because of the holidays and waiting on parts. As parts come in I'll continue the project and posting updates. I've redone all the blinkers and tail light with nice bright LEDs and installed a fuse box. Parts on order: Wolo mini Horn ...
  6. U

    1970 Yamaha R5 "Rust Bucket" Build

    10/18/15 Got a "new" seat, front end with working suspension, changed from front drum to disk brakes, and assembled everything for a test fit. I think I'll keep the white instead of chrome, doesn't look too bad. 10/23/15 New brakes came in today. The brake handle comes with an integrated...
  7. U

    1970 Yamaha R5 "Rust Bucket" Build

    Thanks Beast775, I really like this frame too. 10/9/15 My motor just came in xD Banana for scale of course 10/10/15 Finally sold the last of the old motor parts. Made a total of $570 USD from parts and I bought it all for $600 USD. Also found a guy who's been rebuilding these for the past 30...
  8. U

    1970 Yamaha R5 "Rust Bucket" Build

    I'll be keeping track of my E-Motorcycle build here, nick named Rust Bucket, for those who are interested. This is my first motorcycle build so any tips or tricks would be appreciated. I'll post my experiences and progress as they come. Build plans: Motor : Mars 4201 - Delivered Controller ...
  9. U

    Excelsior/Strong GTS Cromotor Build

    Awesome build! It's making me want to pick up a Cromo. I have a 74v 40a mini-Kelly with the same hardcase batteries. What's the average speed and range I could expect on 20s 10Ah?
  10. U

    Looking for cheap Lifepo4

    Thanks Ypedal for clarifying. My mistake, I thought the format for continuous and peak was xc/xc. I mean I need 4c continuous and 10c peak. Yup headways are what I'm looking for, I'm just trying to find if there's a deal out there where I could get them cheaper than 19$ ea. I've been looking...
  11. U

    Looking for cheap Lifepo4

    Any good priced or sales on Lifepo4 cells going on? I'm looking for 10Ah 4c/10c, or better, for less than 18$ a cell. Thanks in advance.
  12. U

    Trouble keeping cells ballanced.

    It's weird I just did another capacity test on the 4sGM cell 3 and it's at 9.9 Ah. I'm going to do a capacity test on 4sHW cell 3 next... I might have been shipped a dud? Thanks for the vote of confidence, but I'd rather stay away from LiPo. I know they're cheap and powerful, but they have to...
  13. U

    Trouble keeping cells ballanced.

    Just finished testing them all 1 after another and I can see now why the 6s cells are so messed up. Battery Number Ir 4sGM / 1 / 100 4sGM / 2 / 92 4sGM / 3 / 94 4sGM / 4 / 98 4sHW / 1 / 90 4sHW / 2 / 94 4sHW / 3 / 96 4sHW / 4 / 86 6sG1 / 1 / 94 6sG1 / 2 / 94 6sG1 / 3 / 96 6sG1 / 4 / 98 6sG1 /...
  14. U

    Trouble keeping cells ballanced.

    Ya right now my sag under a full load of 25a for my whole pack is about 10v, 71v full charge to 61v then back up to 66v. I'd like to go with LiPo but I don't trust myself and don't have an option for a proper safe charging setup. I've got the 6s packs charging right now and will be able to...
  15. U

    Trouble keeping cells ballanced.

    I'm using the discharge function of the HK as a 5A load. I'm not trying to find the most accurate or actual IR. I just need a baseline to know the overall health of my cells compared to each other. I suppose I could connect my cycle analyst and see exactly how many amps and volts I'm testing...
  16. U

    Trouble keeping cells ballanced.

    Ok, so I tested 2 of my 4s packs. At first I was getting upset because they were all in the 180mohm range and I couldn't understand why my packs were still working. So I hooked up my multimeter in parallel to the HK charger and to my surprise the HK is not accurate at all :/ go figure. The...
  17. U

    Trouble keeping cells ballanced.

    Thanks, you've been a great help. I'll do this tomorrow and post my results. I'm going to keep using these cells regardless until they kick the bucket because I can't afford to replace a lot of them at this time. but maybe I'll be able to find their new c rating xD
  18. U

    Trouble keeping cells ballanced.

    Thanks, that clarifies things a bit. When I'm testing these cells, should I test them immediately right after they charge and are at 3.6 or should I wait for a few minutes for them to settle down to where they sit stable, usually 3.56-.54?
  19. U

    Trouble keeping cells ballanced.

    I am a little surprised that IR is tested on a cell fresh off the charger. To me it would seem like a better plan to test after the cell stabilizes at nominal and then testing voltage drop...
  20. U

    Trouble keeping cells ballanced.

    Thanks for the info Ykick, you've been very helpful. I'm going to go ahead and start logging my cells like this guy does. I have a mix of cells right now: 4s headway pack 5c/10c new 4s GM rectangular one 3c/10c this is the tested cell 2x 6s GM rectangular one 3c/10c I think I killed a few...
  21. U

    Trouble keeping cells ballanced.

    Just started a discharge test. I can only do a 5A discharge but the cell in question drops from 3.6 to 2.88 under that 5A discharge. That seems like a very steep drop.. would you say this cell is toast? I'm going to finish the discharge test and then post the capacity. I should mention that...
  22. U

    Trouble keeping cells ballanced.

    Thanks Ykick, that makes perfect sense. I'll probably make up a 1s charging setup like you did until I have the down time to do a discharge capacity test. My balance charger doesn't have the graph or anthing special, It's just a cheap charger to help me get by till I can afford a better one. I...
  23. U

    Trouble keeping cells ballanced.

    I've got 2 LiFePO4 packs, 1 6s and the other 4s, and they will not stay balanced at all. I'm using an HK 200w balance charger and I notice the same cells are always finishing first causing the rest of the pack to painfully trickle charge. In each of the packs 1 finishes to 3.6 and the others...
  24. U

    48v 10aH LifeP04 Battery Repair

    Your fingers are safe, you can touch the terminals with your bare hands and not get a shock, as long as they're dry. I started with my MP3 without knowing anything and now I have and external kelly controller and have taken the GM lifepo4 pack apart and remounted the cells on my frame. It was...
  25. U

    Throttle cruise control question

    Quick question before I proceed and possibly do something stupid. I have a GM throttle with a micro switch for a lighting setup and a Kelly controller without cruise control. Would I be able to send 5v source to the micro switch and out to the throttle position sense line going to the...
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