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  1. O

    Rear disc conversion for Motorino/Davinci/Daymak e-scooter

    Thanks for looking: I've got a Davinci ebike/scooter that I converted to an 84v lithium pack with an 80 amp controller. The Davinci looks like a Motorino but I'm hoping I can buy a new side cover for the hub motor to put a disc on it. There does not appear to be any name, number, etc on the...
  2. O

    Importance of matched cell resistance in pack?

    I bought a battery charger/tester and noticed while testing the first group of four LGHG2s that the MR values (I assume internal resistance) have variations. Of the four tested so far, two were 32mr, one 38mr and 45mr for the other. Is it best to do a charge/test cycle on all of the cells I have...
  3. O

    Fresh battery build issues

    I've built a total of two batteries now and not having much luck with this one. The pack was built from 180 LGHG2 cells from Battery Bros, welded with a Sunco using .015 pure nickel strips. The bms is rated at 100 amp continuous. When I put the pack on the charger for the first time it started...
  4. O

    Can I shorten BMS sensing wires?

    I tried ES search and google but couldn't find an answer. I'm having trouble with a pack I built (20s 6p) where one group (19th) ends up one volt lower than the other groups then the BMS shuts the pack down. I changed the group thinking one of the cells were bad and the pack did the same thing...
  5. O

    eRuckus style

    While travelling in Asia you see a lot of these lowered/highly customized Honda Ruckus scooters which I think have a cool look. I've decided to borrow the vibe for a fun, low dollar build although there's no cheap way to replicate the look of those fat little tires. Here's my starting point...
  6. O

    Tilting trike pivot location

    I'm planning to build a 2wd tilting delta cargo trike (two wheels in the back). What height would be best for the pivot to allow it to right itself after a turn? Should the pivot be above, below or on the centre line of the rear wheel axles? :roll: Thanks
  7. O

    Help wiring Kelly KLS-S controller

    I recently purchased an order of motors from QS and decided to try the Kelly controllers they also carry. As I had ordered some 45H V1 motors, it was recommended that the KLS7218S would be my best choice. I used both the site search and google search to look for background info here on ES but...
  8. O

    Is a solar power fridge available?

    I'm doing a hub motor conversion for a guy on his ice cream trike who was asking for information about a small solar powered display refrigerator he saw a vendor had at an event he attended. It may be an urban myth that there's an all-in-one solution for this as the vendor wouldn't give him any...
  9. O

    Anyone know Greentime controller RShunt values?

    I'd like to have my Cycle Analyst showing as accurately as possible, but I don't know the RShunt value for my controller and I've had no response from Leo on the subject. This is the Greentime controller I have if anyone knows (or has a reasonable guess) as to it's shunt value...
  10. O

    Budget priced sine wave controller

    Has anyone tried one of these controllers from Aliexpress seller ChangZhou SuRing Vehicle Parts Co? http://www.aliexpress.com/item/DC-From56V-to-90V-Universal-2000W-4500W-sine-wave-controller-dc-motor-controller-electric-bike-controller/32344825415.html?spm=2114.10010108.0.192.PYEtZa Is it...
  11. O

    Bobber style scratch build

    I decided it was time for a new bike, this will be my sixth build, my forth with a custom frame. I wanted to build the entire bike this time, including the forks/handlebars as well. This will be my most ambitious build to date. Staying within a limited budget I opted for the Magic Pie 2, 24" x...
  12. O

    Which MXUS winding to use?

    For my next build I'm planning a custom cruiser style with an exaggerated fat motorcycle tire on the rear (120/80/18) along the lines of the Marrs ebike. I am going to run 2x 60 volt 20ah packs in parallel, possibly one of the Greentime 5000 watt controllers or similar but am unsure which...
  13. O

    All black MP5

    I see Luna Cycles are selling an all black Magic Pie 5 hub motor which is more stealthy. When I look on the Golden Motor websites the version 5 shows to have the same cheezy turbine pattern which is absent on the Luna version. Did they remove the side covers, lathe off the pattern and repaint...
  14. O

    Bionx battery hack

    A friend of mine has a 36 volt 10ah Bionix battery leftover from a conversion gone wrong and would like to repurpose it for another project. He believes it's LiMn chemistry and appears to have cells connected in 5 groups of 12 cells. This system appears to have no BMS although there was a...
  15. O

    Golden Motor LiFePo4 charger problems

    Hello All: Last summer I purchased a Magic Pie III and two 10amp/hr 48 volt packs from Gary at Golden Motor Canada. One of the battery chargers' fan recently stopped working and as expected the charger got hot while in use. After a couple of ignored emails to Gary, I opened a 'repair ticket' at...
  16. O

    Are LiIon chargers okay for LiFePo4

    About six months ago I bought 2 LiFePo4 batteries from Golden Motor Canada but have only just noticed that the chargers say LiIon not LifePo4, are they interchangeable? Thanks
  17. O

    Electric Drift Trike

    Here's a few pics and some video of the e-drifter I built. It's basically an adult big wheel and no less fun than you had as a kid on the original plastic one. It's made from 1.5" x .95 wall ERW with 5" go kart wheels and short sections of 10" HDPE drainage pipe slipped over the tires to allow...
  18. O

    LiFePo4 off gassing during charging

    I've been running the same V-power 48 volt, 20 amp battery pack for about 3 years now, had to change the BMS once about a year ago due to a burnt connector on the BMS plug. Lately, I have been noticing an electronic smell when charging the battery. Not an alarming, choking you odor, but a...
  19. O

    Greentime runs, but backward!

    I bought a Greentime controller which seems to come with no after sales support... at all. Does anyone know the connections shown in the picture? The controller has regen braking and a 3 speed switch. There are only two connectors with three wires, I assume one's the throttle and the second one...
  20. O

    Golden Motor Magic Pie 2/3 worth buying?

    For someone looking for a quick easy to maintain commuter system, this appears to be good for the money. I've been beating a poor 1000 watt first generation MP for 3 years so far on 48 volts with no complaints. They have a video of the motor running submerged in a barrel of water...
  21. O

    Battery surgery replacing BMS wires

    I've got a 48 volt 20Ah 'duct tape' style battery from CDI. Every now and then my system shuts down completely, I disconnect, then reconnect the positive lead and the bike goes again. Last time this happened my BMS was at fault and I replaced it with exactly the same factory one from CDI. This...
  22. O

    Width for BMX rims with scooter tires?

    I'm planning a 3k watt mid-drive powered trike and am considering 3.00 x 16" scooter tires on 20" BMX rims, how narrow a rim would be considered safe/appropriate with that tire? Thanks
  23. O

    Replacing BMS on COD Power pack

    The BMS on my COD Power 48 volt 20 amp LiFePo4 pack appears to be keeping my system from operating. All cells read 3.3 volts, I believe the trouble to be the BMS. I tried to buy one on eBay from COD Power but they still haven't sent it 18 days after receiving my payment and so I have started a...
  24. O

    BMS problems?

    My cheap Chinese 48volt 1000 watt hub motor system suddenly showed a dead battery condition (no blue leds, just the red one). After returning home I checked the voltage coming out of the battery pack (52 volts) compared to coming out of the BMS where it hooks to the system (3.5 volts). I opened...
  25. O

    First e-bike build problems

    I wanted to build a budget e-bike to get a taste and although I've encountered nothing but trouble so far, I can see how addicting it could become. I bought a wheel kit on ebay from a supplier in China and have had trouble from the time I opened the box. The kit is 1000watt 48volt and to keep...
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