Great thanks. I had it right - I actually just found out that my spark tester bulb was blown and that I did infact have spark. It is now very strong after I cleaned up the coil and flywheel BUT it still wont start.
I now has no compression at all in either cylinder so I have a bigger problem now ... While turning the flywheel by hand with the cowling off I can hear a quite audible whoosh sound so it has a leak from somewhere but I am not sure where. Tomorrow I will pour talcum powder over the engine and see where it blows from but all I can think of is someone has removed both head gaskets and not replaced them. The needle doesn't move at all on the compression tester (Yes, I know the tester works this time).
Anyone have any other suggestions? This is the first twin I have worked and am not very familiar with them.
Thanks,
Pete.