Just went on a spirited three day ride on my 1982 R100 RT, running around 4000 rpm most of the time and a lot of 70 mph stints. The final drive vent throws so much oil it is ridiculous. Every time we stopped i had to wipe things down. I had oil all over the rear tire. The fluid levels were correct to start the ride. There just is no splash guard for the vent. When i look into the boss for the vent, i see the gears. This is a horrible design. Has anyone else had this issue? How did you resolve the issue? I just tried a fix. I'll let you know if mine worked when i take it out next time.