Ok,
thanks for all the advice, now I have 2 questions about these choices. What would you recommend more the 100kv or the 120kv, I would guess If I am aiming for a budget battery I will take 120? The other question is the VESCs, I would take the 200A one but I don’t know which, It is not going to be water cooled, but then I got lost in the pro and pro2 variants.
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There are a variety of threads here from people who have decided to build an “efoil”. Some proceed cautiously doing lots of reading to find a successful build that aligns with their goal. Others leap in and start buying stuff without an overall plan.
Some want to build a full efoil modeled closely to what you could buy commercially - think Fliteboard or Lift. Their use case is mostly in fairly calm water with the motor mounted down close to the foil,
Others want a rig that is modeled after something like a Foildrive to “assist” them in wave riding, pumping scenarios. These typically have the motor mounted close to the bottom of the board as they don’t want the drag of rhe motor and prop to affect the ride.
Those use cases profoundly affect what components to purchase.
My advice again is to do lots of reading here BEFORE you buy anything.
What might be a good investment is to visit an Efoil dealer or school and have a demo-teaching session on a full efoil so you have an appreciation of what that’s like.
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Max torque for this motor is way too low at 4.5Nm. It won’t work in an efoil.
Required torque for an efoil motor is around 8-10Nm. Cheapest is a 6374, this is used on foildrives but i don’t know what margins you get with it as a beginner foiler or heavier rider. Therefore this is not what i would get for a first build. For an efoil i’d get a 63100 or 65161.
Don’t buy anything from freerchobby.
First build = stick to the proven stuff = succeed
If you love it, build your second dream board. This way you’ll have a ride to soften your frustration if you run into issues on the dream board🤙
I still occasionally ride my fugly first board that was built in three weeks, at 1200USD total cost. Too many here wanted a perfect first board and got lost in building issues. It’s about the ride!
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Yeah I totally agree with your mindset, I will probably buy the 65161, so I have my options open for future projects and so… thanks to all for advice.
Edit: Which 63100 would you recommend? The one from flipsky? Since it is not waterproof and I don’t know what comes with that territory, also an outrunner, so if anyone can explain that it would be very nice, thankyou.
You can get the motor made water resistant from saite. An outrunner can never be waterproof, water will enter the motor, you can treat the stator and rotor with coating and change the bearings to stainless or ceramic.
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I’d get the saite linked above - if i wanted an outrunner. I don’t since i really enjoy the silence of the 65161 inrunner. All outrunners i’ve tried produce more noise and for me the silent ride is something magical.
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THe 65161 is very quiet with the flite prop. A friend who is a lift dealer commented on how silent my setiup was 
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Yeah for sure I am leaning to the 65161 for now, can’t go wrong with the tested gear.
It is also a question of the esc, Lift still uses bldc, thats also a reason why they are louder. 63100 with good bearings and a quality VESC with FOC is OK, it is not as loud as a Lift.
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I think the new lifts are now foc. I also rode with a guy on a fliteboard and it was REALLY noisy.
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Foildrive runs at 1350W after their initial boost. At 65kg you won’t need a lot of power if you have good technique and make a good board choice.
New question popped up, 65121 vs 65161, is 65121 worth buying or is it again just better to go for a safe option and for sure enough power.
That question is quite easy to answer if you know what you gonna aim for.
The 65121 is a nice and light motor that produces enough power for me (85kg) to go 30 km/h. It needs a lower pitch propeller to get started, hence the reduced top speed.
And it doesn’t have the power of 65161, so if your aim is to go fast you would have to choose the 65161 cause you can easily run higher pitch props on it to have higher top speed.
So to sum up it’s either light and more affordable setup with 65121, or more torque and higher top speed with 65161.
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You seem to be focused ONLY on the motor choice.
You have yet to indicate your use case so you may be getting feedback that although accurate may not be a best match to how you are going to foil.
You mentioned earlier you intend to use a 120l board and a 1800 foil That’s a pretty big rig even for full efoil in flat water - probably way oversized for foil assist in waves.
I don’t think many use a 65161 in a foil assist mode as it’s heavier than the motors typically used for that.
Bear in mind that you should match the motor to vesc, battery size, foil size and shape and board size and shape😀
Hi, yes, thanks for correcting and reminding me. So it is going to be a full efoil, not an assist, while the 1800, (or maybe it’s 1600, I have to check) is a beginner foil which I have availabile to use, I have foiled on way smaller foils and will be upgrading this one to smaller and faster wings. I am focusing on the motor since this is the thing that provides the power, and I will build around it, currently in the stages of figuring out what battery I will use. I am almost sure that I will do a 65161+75200+VX3 directly from flipsky, homebuilt battery, have found a very nice video explaining just that on here, while I have found that this motor is obviously very power demanding, so will need to decide which one I will pick, I do see the added flexibility in the 65161 because I can always limit it to basically act like a 121. Thanks for all the help, please do correct me if you think my mindset is somehow flawed hehe.
If you are going efoil your 65161 kit from flipsky is a good choice. I have 2 full setups now and they work great. On 12s I can go over 40kmh and happy cruise at 30.
Glad to hear are continuing to read here. Lots of skilled builders have documented their success and failure so the knowledge is here for the taking😀. Search mode is very useful in finding specific answers.
Seems like your plan is taking shape. Before you go much further I suggest you come up with how you are going to mount the battery and vesc as they they require a “dry” ride😉
For sure, every time I read literally anything on here impresses me what this community does for each other, not many like this out there! So yeah, mounting the battery and vesc, I thought about mounting them in a pelican case on the board. Right now I am still considering actually implementing the water cooled vesc, I have the gong v2 alu mast which is hollow so I can fit the hosing in there (which would be a small hose anyways) but I have to research that a little more, didn’t search for it on this form yet. Now I would like your advice on where to put that case, in the front? the back? Thanks for all the help.
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One issue with this combo for an efoil is the 1m+ of power cable going from the battery to the ESC. Usually you want the battery and ESC as close as possible to prevent damage to the ESC
Quite a cool idea, but I would keep everything seperate, especially for a first build.
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