Ok, I changed the oil in my bike and like others, found the machine that was straight across the middle warm, but not hot has a full "sight" glass after my last ride....

Bike does not seem to be affected, and it is over the high mark, but there is a little bubble of air at level......... (I know, I know, oil expands, should have gone only to the low) It was my first oil change on this bike.

Question is "Can I use a plastic tube (clean) and "pipe" out some of the oil from the top fill hole?" I should be able to use a length of clean tubing, put my thumb on it to keep the pressure and get enough out to bring the sight glass right......

I hate to drain the whole bike for .1 or .2 oz

I'm going to stretch my neck out here and say leave it alone.  That dumb sight glass is about as unscientific a means of measurement as you will ever find.  If it's reading a little high, double check your tire pressures.  If one or the other tire needs a pound of air, the oil level in the glass is going to change.  I'm just happy when the oil is somewhere in the glass.  If I can't see oil, then I'll start worrying.

Look at it this way:  You can spend all that time goofing around trying to get an ounce of oil out of the bike, or you could spend it putting a couple of hundred miles on the bike and using the oil up.  One is an exercise in tedium, the other is, well, not an exercise in tedium.