ORIGINAL: mandtra
What are most of you (fuel) running in your saitos? I run 30% HELI I have a few of them 72, 91 100 and love them all but recently have been trying to get the 72 to run inverted and on 15% with no luck. wont idle good and runs rough. even when i go back to the 30% it runs better , but not great. I dont think it likes being inverted. it's on a seagull space walker and the 72 has about 2 gals thru it.
I use 15% Coolpower with 2ounces of Klotz castor added to the gallon for all my Saitos. Runs great, no bearing issues so far.
Check your tank height wrt your carb position when you invert the engine. Should be within 1/4-1/2 inch height difference.