Try reseating it first, but if it keeps backing out see if K-T will send you a new one. They don't normally come loose like that.
There is no set depth. Just try to make it even on both sides.I will try reseating it first.
How far down should it be seated? I don't have the bolt in front of me to look at right now....
Thanks
Punch it down first to form a pocket. Drop or spray a non-petroleum base solvent in the opening until it comes out the other side. Acetone (non-oily fingernail polish remover{check the ingredients}) works very well with a Q-tip. Then put one small drop of Loctite Blue, or equiv, in the pocket and center the pin. You may also center the pin first and then wick in the green.Clean it real well, put a dab of green, (wicking), Loctite on it, punch it back in flush. Check the other side, make sure it doesn't come out higher than the surface.