depending on what you are riding in ie... trackday or racing... trackdays usually only require certain things but even if they don't require anything.... always wire your fill and drain holes like oil drain and fill, oil filter (put a hose clamp around the filter and wire the clamp to something) at least.
different series require different things... some want all bolts that retain fluid and some want all caliper bolts, pinch bolts, brake pad pins, banjos and axle nuts. most of which is a pain but I will be honest, I was in a hurry once and got distracted and forgot to tighten the caliper bolts and Im sure you can imagine the rest (i didn't crash).
another thing I would wire is your front brake lever to the master cylinder (usually a hole that goes through the mount). My friend went into a turn w/out a front brake lever!!!!! he crashed!
another good one that makes it very easy to pull axles is a couple holes drilled in the chain spacer with safety wire inside some tubing so you can grab the tube and pull the axle out on the other side, drill the axle and put a huge cotter pin through it so the nut can't come off.
hope that helps.
VP fuel and me..
..adds 5 hp..