it was completely my own stupidity and desire to get it done quickly... and as they say "more haste less speed"
i didnt consider the lower retaining part of the main jet actually had a central hole, and took more care cleaning the other part of the jet (the long part with about 15 holes) that explains why after a few mins enough petrol managed to pass through, but not continually. now i have cleaned it properly all is well ;0
to answer your Q re' the airfilter, to be honest it doesnt look too bad, definitely not blue/black or oil soaked. thats why i was wondering if i had bent the choke lever a little whilst coaxing it off last time.
tomorrow if i get time i'll knock it out to see if anything shakes loose...
