rejected standard  CV carby  with  aftermarket  S&S  teardrop aircleaner  with 2 into 1 supertrapp muffler with 1  1/4 inch hole in back plate used 45 low jet and 180 main jet  having trouble now with fuel spraying back into aircleaner  and leaking down onto motor .dont know whats going on .  has anyone got any ideas ?

Sounds like you've blocked off the float breather when you fitted the new air cleaner. Just remove the new air cleaner and see if the gasket or filter is blocking any holes.

if the bike has had a paint job done try jacking the bike so as to have fuel cock at lowest  possie leave filler cap off &  undo fuel cock  bump 1 ltr fuel into container watch how much grit comes out  then clean line out check to see if it has a 4 prong needle valve  is better than the early type 3 prong type  new needles arnt too dear to buy 22 bucks original, check fuel bowl level bowl should be 3/4 to 7/8 full bike in up right possie  should clean fuel cock  every year at least can pick up a lot of shit from servos  as well needles can get a bit of dirt stuck under them.