In the Northeast and Mid-Atlantic regions they typically check:
* Tires
* Brake pads
* Throttle return
* Brake lever firmness
* Taped stuff if you bring a street bike
* Nothing can be loose or in danger of falling off - particularly pegs, pedals, frame sliders, exhaust, calipers, bodywork
* Chain tension
Older, rougher bikes (like my CBR) do receive a little harder look. My exhaust is trashed and wiggles a lot but it is secure to the bike. It always gets lots of attention at tech. There are some ROUGH bikes that get on the track.
Hope that helps. HAVE FUN!!!