There's a lot of moving parts on a bike that we often take for granted. Most riders don't think twice about our seat until it starts swiveling or our pedals until they get stuck. Along those same lines is the bike headset, which serves a definite purpose but is also prone to coming loose, squeaking, and causing a general nuisance while we ride. While a headset replacement is not too far out of the realm of a simple DIY fix, in some instances the unit simply needs to be tightened back up instead of changed out. Here's how to do it.