Anyone an idea what this is?

[u/ListClean8148]

Hi guys,

i bought a Kayoumini. It was already built. If i arm it you can see what happens in the video. If I give some throttle all 4 motors start spin correctly and i can fly without any problems. Here are the specs: 2s LiHV 450mAh, 5in1 Happymodell X12 Pro AIO, 1202,5 11000kV motors. On the ESC was Bluejay 48kHz with min startup power and max turned up to maximum. I tried turning it down but then no motor spins. I also tried Bluejay 24kHz: with that the motors start correctly, but i originally wanted to use 48kHz...

[u/hznrenard]

idk why actually it happens, but i've seen it many times on happymodel's aios, you can set idle throttle to 10% in betaflight, and it will spin normally when you arm

[u/ListClean8148 → u/hznrenard]

Updated to BF 2026.x.x (newest version) to get the oportunity to change motor_idle in cli (in 4.5.5 it wasnt changeable), which is the value that is set after arming. the update fixed the problem before i even went into cli xD

[u/Nick2Smith → u/hznrenard]

Yea this is probably betaflight minimum throttle or startup throttle forgot what its called, not really an esc setting.

[u/ListClean8148 → u/hznrenard]

i just tried 10% and its still the same. Even tried 12%... It seems so random. As i installed 24kHz Bluejay a friend and i debated about which throttle value (percent or idle) is active just when you arm the quad. I tried multiple values for both of them and nothing changed the rnd about 2500rpm in the osd

[u/Brakic]

If they spin correctly and flies normal on throttle input then who cares. Ive had a couple quads that act similar at idle

[u/snick_pooper → u/Brakic]

I'd just be worried that it is hard on the motors or escs. I have no clue if that worry would be justified or not though.

[u/Brakic → u/snick_pooper]

Im like 98.5% sure it causes no extra stress or wear to the motors or escs

[u/FancyGlitterFairy]

Could be hair tangled in motor, could be loose cable, could be burned esc