it turned out the half moon seal had popped partially out letting the oil escape. I managed to push it back in place and then trapped a wedge of kitchen roll behind the chrome cover just in case it made a bid for freedom on the way home. This sort of worked but when I arrived home my new jeans where soaked in oil 
My mates son was cleaning the back of his works van out and gifted me a huge bag of clean rags. Now I'm not the sort of bloke to turn down free stuff even if sometimes I don't have an immediate use for it but a huge bag of clean rags was not going to get refused no matter what 
My mate set too with a bungee cord and strapped it to the pillion. Being a lorry driver like me I never thought to check his handiwork as my mind was elsewhere imagining massive oil leaks and engine seizures. Halfway home I felt the bag of cloths move and the following car honking at the bag of rags in the middle of the road
So all in all an eventful day. Unfortunately the bike will now have to come off the road for the winter while I sort the top end out once and for all.
