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  1. H

    Yamaha YZ250F

    There was no sin-cos on the C700 spec, though qs180 had it. Either way, it uses ABI so no worries then.
  2. H

    Yamaha YZ250F

    Does the 3shu have support for the encoder you use? Looks like C700/CL700 have very limited support for different encoders/sensors. Cant understand why they don't have proper sensor support in their HW when VESC SW obvious has.
  3. H

    Nova Cruz Voloci Scooter/Bike Info

    It was a joke! I hope your battery does not fail due to missing insulation, I just think its important to bring up since it can be catastrophic if battery groups shorts and its a common fault that is easy to prevent. Regarding "major battery manufacturers make packs this same way", maybe so but...
  4. H

    Nova Cruz Voloci Scooter/Bike Info

    Don't trust everything you see on commercial photos :)
  5. H

    Nova Cruz Voloci Scooter/Bike Info

    Sorry to say but that battery is crazy dangerous. Have you missed to add cell insulation between the groups and insulation pads at the positive terminal? You are most likely to get a short circuit due to wear on the cells plastic cover due to vibrations.
  6. H

    Yamaha YZ250F

    If you want regen when throttle is low you could try add a comparator with voltage divider preferably a tuning potentiometer and set preferred voltage level when regen should turn on or off, or use arduino but it feels a bit overkill if you´re not going to use other features.
  7. H

    First time builder looking for help

    20*3.7*16 = 1184 wh, 1.184 kwh
  8. H

    First build - "KTM SXE"

    Yeah I use old Derbi Senda front sprocket, as you said 420 on those.
  9. H

    First build - "KTM SXE"

    Check with these guys as well, they had 520 sprockets a while ago. https://www.electroandcompany.com/
  10. H

    First build - "KTM SXE"

    I would just grind it off since its just a holder for the guard. If you have access to a lathe you could just mill out the old spline from your 520 sprocket and and to the same on the 428 sprocket you got with the motor and weld them together. Not that much work and you get your 520 sprocket :)
  11. H

    First build - "KTM SXE"

    One store in UK sells them https://mighte.me/product/13t-520pitch-qs-v3-and-70h-sprocket/
  12. H

    First build - "KTM SXE"

    What if you just mill/cut of the chain guard holder and put a 17 front sprocket. With 17/38 you get about 135km/h @ 6000 rpm.
  13. H

    First build - "KTM SXE"

    I will follow this build :) Motor has 1:2.35 gearing and I run it at 6000 rpm with 14/54 sprockets on 18" dirtbike tire with a top speed of 80 km/h. If you cut the chain gard holder on the motor you could fit bigger front sprocket, otherwise 14 is about the biggest you can fit. With 14 teeth...
  14. H

    MH RYZ (derbi 50cc)

    If you going to build something similar as this build, go for the QS138v3 motor with internal gearing. Its perfect for this kind of build and you don't have to have a large rear sprocket. These guys peak 30kw with that motor: https://youtu.be/zhzN1Eg4tSk
  15. H

    First time builder looking for help

    With qs120 no problem! But i think you should ignore the 2000w marking on qs120 because its more like a 10 kW motor. Not to compare with shitty my1020 motors etc.
  16. H

    Portable snow tank for towing skiers

    From what I read VESC can't really handle high current for more than a short while and I guess you don't want to be on the limit. Regarding motor I would go for the QS120 motor. You get more power than you need with two of those. I have the QS138V3 and as someone said, you can push 30kw for a...
  17. H

    Portable snow tank for towing skiers

    Sounds like a fun project! I work as a embedded developer so I would say I know my coding. My strong recomendation is to skip the part where you develop your own motor controller and go stright to the stearing controller part. Buy two qs motors with matching motor controllers, votol / fardrive...
  18. H

    Yamaha YZ250F

    Do you have Sensor supply + Sensor supply gnd Encoder out 1 Encoder out 2 Motor temp Or supply supply + supply supply gnd Hall A Hall B Hall C Motor temp
  19. H

    QS 138 70H with Gearbox

    Where do they sell it paired with EM200? I have only seen paired with EM150 on aliexpress.
  20. H

    Chinese E bike Motorcycle

    How do you expect us to answer when we don't know which bike you have? Probably noting you can disconnect to get it faster, what you need is: For better range get new battery - build or order custom built. For faster acceleration - get new motor controller if motor can handle more power...
  21. H

    KTM 200 exc goes electric

    I have about 10:1 and top speed of 75 kmh with a lot of field weakning ofc. I think 9:1 would be perfect.
  22. H

    Yamaha YZ250F

    What kind of charger are you using?
  23. H

    Yamaha YZ250F

    Have you tried to tool for sevcon? DVT or whats it called. There you should be able to measure Inductance and resistance. I use another brand of controllers and they measure this during motor learning.
  24. H

    Yamaha YZ250F

    120-170 uH is about 10 times more than I have on my QS138 if i remember correct. Have you tried measure the other phases? 120-170 uH doesn't sound like a strange value since the motor is way bigger and I guess its quite low KV.
  25. H

    Help choosing motor for pit bike converions

    What kind of packs do you use? You could always limit the max current in the motor controller to what the battery can handle. In case you get better batteries its nice to already have a motor that can handle it.
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