Thanks. Funny thing- like I said, is that I only add the minimum specs 3.59 qts of oil and yet the sightglass is full . SMH . Most people say that it's between the lines on the glass.When the bike is standing up straight you should see the oil level between those min/ max lines on the sight glass. When the sight glass is clear it means add oil. The amber you are seeing is the oil, when it's black change it.