Join Date: Mar 2005
Location: Philadelphia, PA
Bikes: Jamis Aurora
If it's comfortable, you don't have to adjust it. If it is uncomfortable, AND it is sagging in a manner that accentuates the discomfort, then tighten it. How much depends on the cow it was made out of apparently.
For reference, 6 full turns (when the saddle was WET! Dry would probably tear the leather) is enough to stretch all the conformance out of it and make it as smooth as it was the day you bought it. So any adjustment to an otherwise comfortable saddle should be very minor, and try it out for a bit before tightening any more.
Treasurer, HHCMF Club
Now living in the land of the cheesesteak.
But working at a job where I can't surf BikeForums all day any more...