Tip of the day.  I got this from an old guy I use to know.

Loosen the lock nut.  Stick a .004 feeler in the gap.  Turn the adjuster so that if just touches down on the feeler.  (Note for newbies,  use your fingers, no gloves, try several times to get the "feel" of it touching.  Only have it touch, no pressure on it).   Then put your wrench on the adjuster and hold it in place.  Then tighten down the locking nut making sure the adjuster does not turn.   When done the gap will be between .003 and .004.  

Works every time.  

The old guy tried to tell me why it works but I got the dog look......  

kk lewi wrote on 10/07/09 at 18:43:02:

Oh boy newb's (time to have fun)
TDC (you ask that like you know where the TPC is) Top Dead Center or when the piston reaches the very top of it's stroke,
stroke is half a rotation.
TPC, Timing Port Cover, the little round thing by your left ankle when your foot is on the peg.  It has a slot in it for turning with a really big screwdriver.
TPCR, timing port cover remover, a really big screwdriver.  Recommended substitute, front disk brake pad.