Quote Originally Posted by BleeckerSt_Girl View Post
Too many new bike riders start tweaking their bikes immediately after their first one or two rides, for every little achey muscle, and then later they wind up having to tweak all over again undoing what they did...only by that time they can't remember half the gazillion changes they made to their bike.
There's an element of truth to this, but I myself have left a bike shop with a bike that wasn't properly adjusted and no amount of waiting to get used to it will solve that problem.

So not so much tweaking, but checking to make sure things are positioned properly is an important thing to do with a new bike. If you check

seat level
seat fore-aft position
seat height (may have forgot to mention that in my other post)
handlebar height
(last resort) stem length

You should ride for awhile with all those things properly adjusted before trying any actual tweaking or replacement of parts (such as the stem or the saddle).

Varying from the standard positions is tweaking (I guess I used the term tweaking in my other post when I shouldn't have), but you need to make sure things are IN standard positions before you decide where they OUGHT to be.