Mr Bump wrote:http://z1ownersclub.co.uk/phpBB3/viewtopic.php?f=4&t=43812&start=15
Sounds like you've found the problem, but this might be of interest too. Note my experience with viton seals that didn't fit correctly. Might be worth checking and changing them while you are in there. I would.
Olly
Interesting!, The othe cylinders all seem fine, I'll chance it for now, as I'll take Al's advice and if I need to split head again I should be able to re use the new head gasket. I have the Vesrah seals put aside...What else would I do in the coming months, No body actually expects me to finish this bike!