Thanks grey wolf, I am beginning to realise that, funny enough, the bike is very nearly a 2008 registration, 20/12/2007, I have checked, only 1 plug per head.
Thanks to this forum, I will not be making any further mistakes when buying bits
Just for info, I did fit a set from D.I.D, and it was very good, so were the suppliers, Hunters Motorcycles, very helpful. I did manage to over tighten the link, causing one of the seals to pop out, but have a spare link to put on which I will do very soon, when work allows.
I am enjoying my "new to me" bike, so smooth after riding singles for 5 years