I have a 2009 GF Supercaliber and just noticed the other day that there was some play in the head. It is just ever so slight, but I can notice while I am riding and it's annoying.

Is this common wear? How do you fix it? Or should I take it to LBS?

The way to fix it would be to unclamp the stem where it attaches to the top of the fork, then tighten the bolt in the middle of the stem which points downward into the fork steerer, then, with that bolt tight, retighten the bolts which clamp the stem to the top of the fork steerer.

The main pitfall is that you can get the torque too low, which will cause the stem to slip or possibly come off; or you can get the torque a little too high, which will make the stem crack or the bolts strip out, which will cause a horrific crash. If you get the torque a lot too high, you'll strip the bolts before you think you're done tightening them.

Some folks on this forum say they work on stems without a torque wrench all the time, and I've done it although I started using a torque wrench, so maybe you'll get it right if you have a feel for mechanical things. Don't forget the stem is probably aluminum, which means it will fail easier than steel and with less warning. It will feel different when it's tight than steel.

Hmm...maybe a LBS trip is in the works. The bike takes a lot of abuse since I race with it. I wouldn't want to be flying down a hill and have it fail on me; racing or not.