I have an 83 R-100 that I believe to be a relatively low mileage bike. It seems to collect some oil in the air cleaner box. I check in there when I change oil and it seems to have 2-3 oz's maybe. I try to add oil and keep it up on the upper line on the dipstick. Seems like there was a thread about oil consumption and oil in the air box, but I can't find it. I sort of remember that keeping your oil level on the upper end can cause this, but I could have dreamed it. Thanks for any help.