headstock bearing covers for gaps

[RODeo]

Hi Oh wise ones......
  When assembling my headstock/yokes I have a gap between the base of the headstock and the top of the bottom yoke.(about 4 to 6mm) Im reckoning that there will be a fair amount of grease in this area from the bearing once finally assembled ,so what normally covers this gap? Some sort of small rubber bellows ?If there is a 'cover' of sorts Im assuming that it would 'float between the two surfaces,or be fixed to one surface e.g. underside of headstock,and 'sweep'on the other surface e.g. the top of the yoke. I cant see any evidence (marks)of this previously happening on the yoke tho'.Is it poss to make something up for this ?Is there some sort of trick to sealing this?
          Rod

[Cabman77]

you normally get one on the top bearing but not on the bottom one. I normally just wipe off any excess grease and leave it at that.