Can anyone please help me?
Problem: I just bought a K2 from 1973, he is fully restarted. After a short ride (some problems to keep the engine running) I discovered a lot of oil on the nearside of the motorbike.
I have opende the oil tank and I see that there are, next to delivery and return pipes, 2 other additional tube on the tank. Looking to the manual on this forum, one (the upper big one) is the " breather tube A" but I don't see anywhere in the manual what the lower/small tube is.
Can anyone tell me where this tube should be mounted to?

?

see picture (the picture is made from the other side and it shows the lower part of the backside of the oil tank.