I need to know if it will come out and if a kk bearing will fit.
yes and like everyone already told you all yoyo bearings come out (with a few exceptions as pointed out already)
certainly, but make sure you get the right size kk. the sky chaser comes in both c and d bearing versions.
i don’t think it requires a kk (at all), but you can easily do it. just CAREFULLY wiggle the bearing out with a pair of pliers.