lean running

i believe me and seventiesspirit are having the same problems less the head gasket leak .my bike as had a 61/2 year lay off beyond my control and the first thing i did when back on the road was fill the tank to the brim ,i drained all my bikes of fuel as soon as i could sorry my son did .last month i put the superdream on the road and it as run fine but the last ride i got it home and it was running very hot and the exhausts had gone yellow,i had jetted up the carbs when i first got the bike as honda run them on the lean side and i say roll on the spanish weather in the uk just contributing my part.my bike as been running with 86 and 115 jets and ran very well.right the carbs in bits and this is what i found as you see i have a inline filter and you can see the problem and in the pic the same in the float bowl ,its not rust or rot well it is ,its a kind of oxidisation very fine that fine it could pass the filters.now the tank as had a full tank of fuel i will probably have no more problems.the other problems with these carbs is the air slide can wear on one side ,this one was ok but the other one i polished it out and polished the slide and body to a mirror finish a thing i picked up from my vfr days.all i can say this crap gets into the pilot circuit and causes lean running and in the end blocks the pilot side just my findings may be of help to someone