Hi SOHC Jedi, Thanks very much for your prompt response, which makes good sense.
Vent from rear of gearbox to lower oil tank connection, passing through the mini-internal tank and then to atmosphere through the top connection, thereby separating oil from air.
Presently, the vent from the cam shaft cover is just a tube with no oil collector. Whilst I have only noted a slight mist from this tube, it has no form of oil/ air separation, venting directly to the road, which might play on my mind when heeled over on a fast bend. Do you know if there was any oil/ air separation for this pipe on the original K0? I’m a purist, but happy to fit an aftermarket filter to save my skin!
Good to be on the forum.