To set the time, when you are on the time, hold both the Select and Adjust buttons down for a few seconds, when it starts blinking, then push the Adj button to change the time, when the hour is set push the Select button and the min starts blinking, then push the Adj button to set the time, when your done with the min, then push the select button again and you are down.
The circle of glass is the sight glass to check your oil level. When the bike is straight up and down look through the glass, you will see two marks on your case, -F and -L those stand for Full and Low, the oil level should be inbetween those somewhere, more near the top towards the F though. One thing to make sure of, run your bike for a couple mins and then let the bike sit for about a minute after you turn it off then check the level. :thumbup: