G'day Muskrat, Trev & Brian
That explains why I could not find the breather pipe - looks like they were trying to save the cost of a bit of tube on the later bikes. I think I will save the Bunn mod until I need to take the chaincase off so I can get to the hole and tap a thread in it to connect a pipe union.
I have found your Bunn thread Muskrat and have saved it for future reference.
Thanks for the help - I can remove the ice bag from my head now!
Jim