Front wheel

Hi all, newbie on this, I've been smartening up my 1990 Zzr 600 and am now putting back together, I have a question about front wheel!?
When I took it off I put all parts together, however on reinstalling I'm unsure of a fitting that doesn't look right,it maybe but 🤷‍♂️ where the wheel fits to forks there is a spacer that sits against the bearing,it seems odd that the bearing is no covered though?? Am I missing a part? Looked in book and can't see anything! Many thanks