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  1. V

    KTM 85SX conversion thread

    Designing and testing the motor brackets. I'm using a laser cutter to make cardboard mockups first. After 3-rd iteration the motor plates fit perfectly so it's time to proceed to real parts. 3mm steel plates. Did first version of the battery box as well, 2mm aluminium case with 1mm separator...
  2. V

    LiPo batteries in parallel

    I'm going to use identical LiPo batteries in parallel to have more Ah. 5S packs connected parallel both by power leads and balance leads. Let's say 6 batteries in parallel. Also I want to connect those 5S6P packs to series so I have 20S 6P pack overall and use Li-ion Daly BMS to manage it. It...
  3. V

    KTM 85SX conversion thread

    I'm gonna use the motors own bracket and mount it to the swingarm shaft. In addition, two 3mm lasercut steel plates on the end flanges of the motor, and distance bushings at the left side for chain clearance. The plates along with motor will form new lower part of the frame, so, the motor will...
  4. V

    KTM 85SX conversion thread

    Some progress, stripped the IC engine and accessories from the bike and tried the new stuff on. Looks like it fits quite nicely.
  5. V

    Electric "tough bike"

    It's been long time since I posted updates here. I have been upgrading this bike, old 20ah LiFePO4 pack finally just wasn't good enough and also developed a lot of sag under the load. So I got crateful of "recycled" (thanks to my previous company) Samsung INR21700-50E cells, most of them almost...
  6. V

    KTM 85SX conversion thread

    I'm considering buying Daly BMS, would 250A model be sufficient? EM200 has 240A burst https://www.aliexpress.com/item/1005006067473354.html?spm=a2g0o.productlist.main.5.79e05ce29ciZ0f&algo_pvid=b2783b28-6be1-4e66-862b-e4dffb601826
  7. V

    KTM 85SX conversion thread

    Hello folks, I haven't been here for some time and this will be my KTM build thread. I purchased this bike 10 years ago or so, previous owner had blew the engine, removed cylinder and then stored the bike outside. Of course the rain did fill up the engine eventually and when I got the bike the...
  8. V

    Another 2-speed dogbox

    It's gonna have traditional oil sump shared for primary transmission and gears. There's adaptor flange between motor and primary drive casing, with oil seal and additional bearing, so if you would want to use different motor, you would need just different flange. As stated before, I'm using...
  9. V

    Another 2-speed dogbox

    Just made some progress designing it. I have CNC mill, but it has only 110mm of Z travel, so I cannot do very high parts. This design takes it into notice. I have an idea of cable-operated gear change - normal MTB brake lever on handlebar. The gears are spring loaded to 2-nd, but if you pull the...
  10. V

    hybrid enduro build

    And with fuel tank mock-up
  11. V

    hybrid enduro build

    A bit frame modelling:
  12. V

    connector for hub motor?

    Hello Is there any connector that contains 3 phase and 5 hall leads in one package? I've been using 3X Anderson powerpoles + sealed DIN5, but maybe there's a better product?
  13. V

    Another 2-speed dogbox

    Well, I'm using standard moped gearbox. The whole gear set cost me 30€ and I can get more in large quantities if needed. The model is Delta RMR-24. There was box full of gearbox parts at local motorcycle shop.
  14. V

    Another 2-speed dogbox

    Hi all I posted this to ES facebook page, but I guess its better to put it here also. I'm building my hybrid bike and one idea was to use 2-speed gearbox. Initially I wanted to use Babetta automatic gearbox, but the guy whom I was gonna buy it, acted like a fool and ruined my plans. So, next...
  15. V

    BionX repair

    OK, here's the situation: I have older BionX hub motor kit on city bike for repair here. Initially the owner wanted to replace the battery, which was dead (0V). So, we ordered a new BionX battery for him, but that didn't bring the bike into life. Now, when I switch it on, the display starts...
  16. V

    Electric "tough bike"

    And once agin, it's repair time. I made real axle stand for the bike, which broke motor cable just where it enters the axle. So, I have to rewire everything. Also I had some trouble with spokes, radial pattern wasn't strong enough for motor torque. The new idea is one hole shifted pattern - all...
  17. V

    hybrid enduro build

    Todays progress - machined the casing side open. There was a bit fuckup, I wanted to get rid of the kickstarter extension on the case, but didn't check it through, it had opening where it didn't need to be. So, now there's hole which needs to be welded shut. This is the position in which it...
  18. V

    hybrid enduro build

    Maybe I use hub motor at front.
  19. V

    hybrid enduro build

    OK, I haven't posted for a long time, again. And once again there's a change of plan. I chose Alien Power C80100 sensored motor (50kv), which should be much better option than GNGbike 2.5kw (on 72V) motor. Also, I 3D-scanned the generator so I can use it with Fusion 360 CAD. For batteries I...
  20. V

    8WD transport platform

    Maybe those, but with wider tyre http://s.aliexpress.com/jE7j2YjA
  21. V

    8WD transport platform

    Hello everyone I'm playing with the idea of making 8-wheeled transport platform, using 8 separate motors. Also all wheels would be generously suspended. First and last wheels would turn to opposite direction, giving vehicle very small turning circle. For wheels, I want to use kids ATV front rims...
  22. V

    Electric "tough bike"

    Thanks. In meantime, we built this black chopper featured on video. It's actually Yamaha Dt125r enduro bike. Or was. 72V 40Ah LiFePO battery, 100A sinewave controller, 13' scooter hub motor. It doesnt even get warm, actually the batteries are limiting factor, they tend to sag under power. It's...
  23. V

    Electric "tough bike"

    The WinterFun ZMzchSJENVo
  24. V

    hybrid enduro build

    I dropped the 2WD idea this time, because I found something interesting: 2-speed automatic gearbox (not CVT) from Babetta moped engine. My friend has this lying at garage and he wants 30€ for it. The operating principle is rather simple and ingenious. Both gears are always engaged, but 1-st...
  25. V

    Manned electric "quadracopter" takes flight!

    Its nice and obiously well developed, but why are its designers mimicking helicopter? I mean there's "fake rotor", which consists of many smaller rotors. It's even circular like usual helicopter. It kinda reminds me first cars, that looked like horse carriages. Same goes for quadrotor bike, that...
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