31-05-13, 02:48 PM
There is a gasket that tends to fail, it holds the gear selector cover. The replacement gasket is metal as the bikes were fitted with a rubber / paper type gasket originally.
I had a similer sounding leak a few years ago and if you remove the sprocket cover, clean the area and then run the bike you should see where the weep of oil is coming from.
If it is that cover it's an easy job to do as removing the cover doesn't leak oil so you don't need to drain / replace oil. It's just a faff take off the gear selector linkage etc. #