Theres a noisy harmonic on the new BN 6384’s i just put on the board, only happens at about 35km/h which annoyingly is about bang on my cruising speed. It disappears about 40+ km/h
Anyone know what causes this and if it can be silenced? Not sure i can live with that level of irritation for the next year or so.
Tried to search for similar but couldnt really find anything
Sounds norm. This is with belts I am guessing.
Search flipsky resonance on the forum. I just ended up buying different motors 
Shitting shit monkeys… fuk i hate flipsky… i bought these some time ago and i have regrets…
Wow, I knew this was a thing with them screeching, but yours really harmonize like crazy. I’m surprised it goes away at 40+ km/h. Cool!
I mean, not cool. Feels bad man
Dang, I thought we were about to get some badass sounding motors.
Fuck flipsky. Buy Saite motors if you want cheap and good.
they just take forever to get to u 
Yep, had this too. I didnt have to put up with it for long though as i killed the motors pushing too high amps anyway lol
We will see, i just ordered 2 days ago, the clock is ticking
i will probably try saite also if i start a new build
I’m also experiencing this but more around 30-35mph but on lower speeds everything sounds normal…with a set of Flipsky 6384 190 using BN M1 GD 
it’ll be 245kv from Liam 
How many amps do i need to push at them to kill them i might as well have some fun with them
If theres a bright side, people really hear me coming
Lol yeah thats the opposite end of the economy
I had magnets slip on both of mine when pushing 120A per motor.
I had some FS 190kv 63100 motors on the research treadmill and they had some really bad harmonics every 3000 RPM, had an issue with a loose shaft (axial play) so maybe check that?
When I saw the title I thought someone put a harmonic strain weave speed reducer on a motor and was really excited 
I edited the title to more accurately describe
i had to google what that is, and i still don’t know what it is 
They use this concept
I have one here, they are really awesome. You can get super high reductions from them. One of the metal gears actually flexes during operation.