CB1100 chain stretched out already @ 3k?

[pekingduck]

Grab the chain at the rear of the sprocket and try to pull it off the sprocket. If the chain is worn, you'll reveal about half a tooth of the sprocket. A new chain will wrap around the sprocket snugly and won't pull away. At only 3000 miles I doubt it’s worn yet.

That's the best guide. If I recall correctly, the chain adjustment from new is pretty close to what you're seeing, and not going to change very much soon.