OK, so today I had a full crank that was running fine earlier this week and then it stopped.. I have checked everything, everything checks out, even with a squirt of starter fluid in the plug hole, not a peep. I have fitted a new module, only thing I have not changed is the coil and I'm wondering if that may be breaking down under compression. In the open the spark looks normal. Tried several plugs, nothing. I pulled the head and barrel off and all looks fine. I have given it a quick hone, (no marks in the bore) and will put a set of rings in it in the morning and see what that does. Things like this bug me because I like to find a cause as to why things won't work.