I know its been beat to death before but I never ran into having a full sight glass of oil until today? I changed my oil the other day after sitting the winter months. I did not change the filter as i only had about 1500 miles on it since putting the bike away so I just put in fresh oil. Used the recommended amount for not changing the filter and the level was good after running and checking. I used the bike today and checked the oil and it was at the low level so I added a little bit. I run the bike and now its a full sight glass. I mighty vac about 1/2 of the small container full on the vac thru the oil fill plug and all is well. I don't get this thing??