Ok.Cheers everyone for your thoughts,Tank filter was fine,HT leads push onto pins in a sleeve with a plastic nut and crush type washer to hold in place.Most of these where loose so tightened them up.Battery terminals sweet.Took out some after market hippy type wiring that went nowhere and was covered in blue electrical tape,so now with all the electric connectors split,tank dismantled coils and leads of,wait a minute whats this,one of my HT leads is black around the end,lets have a look at the spark plug,BINGO !!!!,every plug was hand tight or less,what a waste of 2 days and not to mention money spent on what now are spare plugs,coils and leads,still lets get it back together now,will let you guys know if it cured it.