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  1. M

    High Voltage Ebike Controller [above 72v 20s]

    My sweet spot would be either 26s or 28s.. Lyen (not sure if he is still in business or not) seemed either; quite disinterested in my business, or is a provider of extremely poor customer feedback. Am still open to his solutions if he is out there though.. Any other options on the market? Will...
  2. M

    Reverse Engineered Splines of Various Types

    I have a local connection to reverse engineer splines of various configurations.
  3. M

    Best Value for Money Battery Tab Spot Welder on the Market!!

    The ONLY affordable battery spot welder that kicks major arse... It's the best value for money on the market (around 200 euros for the assembled kit) - yet, it performs like a 2500 dollar machine!! Don't waste your money on the cheap Chinese stuff that leaves you guessing about the reliability...
  4. M

    GY6 Parallel Hybrid?

    Any thoughts regarding a gy6 cvt and an electric motor/ controller combo driving the same output shaft to create a hybrid vehicle? A reverse trike seems like the logical platform but i guess any format could be considered fair game. The gas pedal of the cvt is mechanically linked to the...
  5. M

    2 Speed Gearbox

    Is it worthwhile in investing in the development of said [for ebikes and/ or EVs in general]? I am in touch with an engineer from India with the requisite experience... How about the possibility of a group investment? Dont have figures at this time - just wondering if the need even exists?? Cheers!
  6. M

    Trying to contact Cellman

    Emails through his website bounce back and searching him as a ES forum member [for PM] turned up no results.. Help, what am I missing??
  7. M

    Any comments about Kelly KL-9000M BLDC

    here is the link: http://kellycontroller.com/kl-9000m-72v9kw-bldc-motor-p-1289.html I can't seem to find much info online [a bad sign perhaps]? Any options out there that could deliver more bang for the 800 usd price tag?? No problem if Id get lots more value somewhere else by fronting an...
  8. M

    Voltage/ Controller Combo to run a 5403 on the ragged edge?

    I want to apply a 5403 [running through appropriate short ratio gearing] to a situation where the weight of the motor/ controller combo is not an issue... Can I get the max performance from this motor [i will vent the side covers] using a Kelly controller? Are the Kelleys reliable? Any other...
  9. M

    72V Motorcycle Wheels Mac 6T Motor Street Ride

    Just thought id post a couple of build pix... Awaiting a cnc'd bracket to mount the battery box to the lower frame tube. Will also bump stop the suspension if needed. Tire OD's are 22.5 inches... Theoretical speed calculated for this motor at 72 V is 50 mph... That said, loss factors and motor...
  10. M

    Cheap E-Motorcycle Hub Motor

    Any opinions on the more reasonably priced e-motorcycle hub motor solutions out there??? Thnx.
  11. M

    Ultimate E-Bike Battery Box???

    Guys, why dont we see more of this battery box approach to road-going (non off-road) ebikes?? Can it claim to be headed in a useful direction? It happens to be my personal design... This one is deliberately setup to be particularly low, but ground clearance is obviously adjustable during the...
  12. M

    Twin Motor 2-Speed Drive

    Has it been done here or elsewhere? Each motor is set up to drive through different gearing arrangements, and is automatically or manually switched into or out of service. Would be clutching arrangements be the biggest hurdle? I guess direct drive for each system would be a no no cuz 1 motor...
  13. M

    Any Experience with hub motors from BMS-Battery/ G-Power??

    what's the quality of the 1000W hub motors like and how do they compare with 9C?? thnx, keith.
  14. M

    Nylon HTD pulley - any good for ebike drive applications??

    I have a couple of 80 tooth nylon HTD5 pulleys with integrated aluminum centers for shaft mounting... Pulley widths are both 15mm. Can I successfully use these for ebike drive applications?... My motor is a 55kV Thud rewound Turnigy. Thanks, Keith.
  15. M

    60-72Volts, 1500-3000Watts.. Any Info on this BLDC Motor?

    http://www.rw-e-bike.com/product.asp?anid=21&nid=13
  16. M

    Headway LiFePh Battery Offer

    Headway Batteries China http://www.chinaheadway.com/en/product.asp?classid=13 is offering 48V 20Ah LiFePh with BMS and 5 amp charger for approx. 535usd... constant discharge rating of pack is 50 amps... surge or burst current rating is 120 amps... is this a deal or not? how does this stack...
  17. M

    Maintenance Requirements for LiPo Bricks in Parallel

    I am a newbie to this forum... I did some preliminary research among the earlier posts but the following specifics still are not clear: I want to build a 44v 20ah LiPo pack, by connecting in series, two banks of 4pcs each, 6s 5ah LiPo bricks in parallel. I fully understand the need to break the...
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