so i binned my 5inch pretty hard into a concrete wall at the track last weekend. one of the front arms is definitely bent, you can see it just by looking at it, maybe 5-10 degrees off. the weird thing is all four motors still spin up fine when i plug in and arm it. no grinding, no weird vibrations on the bench at least.

my question is do i need to replace the motor on the bent arm or can i get away with just replacing the arm itself. im running emax eco2 2306s and they're not cheap enough to just throw away but not expensive enough that im super precious about them either. just dont want to fly it and have something fail mid flight if the motor shaft got bent internally or whatever.

also the frame is a hyperlite flowride which i know has replaceable arms so thats sorted, already ordered a replacement arm. just not sure about the motor situation.

pull the prop off and spin the motor shaft by hand. if it feels smooth with zero wobble then you're probably fine. if you feel any roughness or the shaft has any lateral play at all, replace it. bent shafts are obvious once you know what to feel for. i've run motors after crashes that looked way worse than that and they were totally fine, and i've also had motors that looked pristine and had a cracked stator inside that i only found out about when it let go at full throttle. so yeah just do the hand spin test first.

also worth pulling the bell off and checking the magnets if you're paranoid. cracked magnets are a thing after hard impacts.

i had almost the exact same situation with a dead cat frame a few months back, bent arm, motors still spinning. ended up just replacing the arm and flying it. one of the motors starting making a faint ticking sound after like 3 packs and i had to replace it anyway lol. so maybe just have a spare on hand just in case