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  1. K

    Streetfighter/Sportbike build

    Got everything painted and done. The bike was on display last weekend in Helsinki. Also today i took her for first ride this spring, i drove around 30km and the bike felt amazing. It is so effortless to accelerate and so peaceful to ride. I will still have to tests for 0-100, max speed and range.
  2. K

    My first EV conversion: '69 Honda CA160 "Baby Dream"

    Here is how to video. Some trial and error needed. https://www.youtube.com/watch?v=omh9kbEcb-M&t=0s
  3. K

    My first EV conversion: '69 Honda CA160 "Baby Dream"

    No you can not put led there it causes voltage drop and limits current to the contactor coil. Otherwise it is probably alright something that catches my eye is that kelly powerline (purple). Without knowing much of kelly controllers or their internal wirings i hope its okay to feed powerline...
  4. K

    Streetfighter/Sportbike build

    At the moment probe type is set to "NONE" in the app. I am not very concerned as motor does not seem to generate much heat. I will be checking the temp manually next summer and hoping they would fix the nanjing mobile app.
  5. K

    Streetfighter/Sportbike build

    Little update: Got my actual license plate, had to pay 400€ taxes for it. Its not bad as ICE builds which are in thousands of euros usually. Got my rear wheel balanced it was not as hard as i thought. Took about 3h of spinning the wheel and adding weights to the rim. I started working on...
  6. K

    Conversion of a Bultaco Sherpa

    Yes. I did it like that just swap the resistor and the switch you added otherway around and youre golden. That way there is no chance for high currents in the switch even if wire between the resistor and the switch somehow shorts. Any switch will do as there will be less than 100mA over the...
  7. K

    1987 Yamaha FZR250

    Those battery boxes are looking really nice and clean! One thing i would change is the fuse, i dont think ANL fuses are meant for higher voltages? I know a short between those terminals is rare and there is also the BMS protecting but cant be too safe :wink: Take a look on Bussmann LMT fuses...
  8. K

    Conversion of a Bultaco Sherpa

    Hi As you said that is the idea of precharge circuit and it is needed when you connect the battery to the load. Since you dont plan to use a contactor it is only needed for the fist connection and again if you disconnect the battery or the fuse. I personally added another switch in series with...
  9. K

    Streetfighter/Sportbike build

    I actually have not had the chance to test any of that and probably cant this season as its already pretty cold outside. And things i have to do before any real range or speedtests: balance rear wheel, balance battery cells. Also fiberglass is not that hard to do, these fairings are actually...
  10. K

    Streetfighter/Sportbike build

    Finally! After long time waiting to get all tests done I finally got the bike street legal and took it for maiden ride yesterday.
  11. K

    Streetfighter/Sportbike build

    Had brake tests done yesterday, no problems with brakes, clean papers. One issue with controller: It started to limit power due to high temperature. Reason is the wrong temperature sensor which cannot be changed with software on IOS nor Android. Motor itself was something aroun 40°C and...
  12. K

    Streetfighter/Sportbike build

    Android app version is 1.5.4 and IOS app version 2.0.1 both have the same issue; can see option for KTY83-122-> can select it -> but it wont actually change. Saving and reconnecting does not help. I can post couple screenshots when i can if needed? In the meantime i can share circuit diagrams...
  13. K

    Streetfighter/Sportbike build

    I did try to set bms lvc to 2,1V and after that raised max amps to 250A but bms still kicked in when accelerating. I also noticed that i do have quite big imbalance between cells since i did not paraller balance them before assembling the pack. I will first try to balance and see if that helps...
  14. K

    Streetfighter/Sportbike build

    Hub motor just seemed easier to fit. And i like how the cables look going into the motor :D Also more space for batteries and stuff and more importantly no chain noise. Only thing you can hear driving is little electric wheeze and little chiming from brake pads hitting the rotor. (and bms...
  15. K

    Streetfighter/Sportbike build

    Yes, I did change that to a proper one. Bussmann 160A LMT: https://cooper-bussmann.com/products/BS-88-High-Speed-fuses/LMT_British_BS_88_240V_160_450A_79.html#.YRFZuUBRWUk That happened to have the right holder for it. Today some more testing, had to lower battery amps to 200A otherwise bms...
  16. K

    Streetfighter/Sportbike build

    Yes its been half a year i am not good at posting updates. But last weekend was awesome, i got my frame and stuff back from painter and assembled the bike, took couple accelerations on a side street. Noticed that 300A was too much for my battery and bms cut due to voltage sag, lowered the max on...
  17. K

    Conversion of a Bultaco Sherpa

    That is the correct way on the picture. Other way around and it would be a short.
  18. K

    Conversion of a Bultaco Sherpa

    Yes. For short durations like full acceleration smaller cross sections could be used. It wastes a little power and heats up but its acceptable since you wont be pushing full power through it constantly so the cables have time to cooldown. Industrial electric motors take starting current...
  19. K

    Conversion of a Bultaco Sherpa

    Fuses are more complicated than you may think. They wont blow at the amperage they are rated at. Too big fuse and it will never blow on short circuit if you battery cant provide the current. To get deeper into fuses you need to find time/current graph for your fuse. Here is an example. This is...
  20. K

    Streetfighter/Sportbike build

    Seat maybe too high for passenger, will see. It will go lower on once there is weight on it ofcourse. I occassionally need the passenger seat for my girlfriend so thats why its two seater :mrgreen: If the weight is too much i will upgrade controller since that motor and battery can be used for...
  21. K

    Streetfighter/Sportbike build

    Finally got adapters for rear wheel. Also brake caliber holder welded to swingarm. Build is taking shape, missing some wiring and miscellaneous stuff.
  22. K

    Streetfighter/Sportbike build

    I have a very grude version of the wiring diagram, some on paper rest is in my head :lol: electric side of this bike is definitely where im good at. Do you think i need that cross brace? Does it seem like that would be weak spot? Frame feels very solid and upper frame is 40mm 2,5mm thick...
  23. K

    Streetfighter/Sportbike build

    A small update, as i am waiting for adapters being made at local workshop i finished the battery and started wiring everything together. I will have soon to start making fairings. I think glassfibre is my only option since my 3D printer is small. Never made anything with glassfibre before...
  24. K

    Electric Roadster

    Yes i agree! Better have good waterproofing so no need to worry about rainwater splashing and ofcourse you need to wash your precious bike once in a while :wink:
  25. K

    Electric Roadster

    That BMS enclosure looks really neat! Is it also waterproof?
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