understood.  I didn't get that deep into the stem...just started with top center bolt...seemed to do the trick for me.  When I hit my 15,000 mile mark in the coming weeks, its on my list of things to check.  Guess i need to buy the special wrench for tightening the nut?  Where did you get?

ehcycledude@yahoo.com  is the one that makes them.

I think I'm having similar issues, but wanted to get some input before moving forward. I've experienced a pretty substantial head shake/weave thing going on in high speed cornering. It was really bad the last ride on corners I'm very familiar with and have had no issues in the past on I've also noticed the "thunk" going over train tracks and sometimes when applying or releasing the front brake. Thoughts?
Bike is an '08 non abs with 28k miles. Last major service done at dealer at 17.5k

Here is the torque specs in the C-14 area.

http://www.zggtr.org/index.php?topic=1652.0

Here is what the manual says:

○Tighten the steering stem nut with 55 N·m (5.6 kgf·m, 41
ft·lb) of torque first, and loosen it a fraction of a turn until
it turns lightly. Afterward tighten it again with specified
torque using a steering stem nut wrench [A].
Special Tool - Steering Stem Nut Wrench: 57001-1100
Torque - Steering Stem Nut: 23 N·m (2.3 kgf·m, 17 ft·lb

Thanks to you and Roadie for your replies