Got a '05 1200 custom guys. Was rubbin on it a little yesterday and noticed a little oil residue around the shifter shaft. I have changed the primary every time I change the oil (3 times) and always put a whole quart back in. Just wondering if maybe the extra ounces might cause this, or do you reckon I got a seal starting to leak? Never noticed it before and it is time to change oil again. Any experiences with this?