Myself this is my first go motor (3p rspec)..but so far im very impressed by it..I know I only have just broken it in...but still ..I had a jammin .21jpx before this 1 ...and it seems to me anyway...to run so must better...just my opnion..which if u ask my wife ..doesnt mean crap.

as far as what u are having problem with..
I havent run into this as of yet,but i have the new black case 1.
I would take her apart carb and all and give a good cleaning..needles an such.install new orings if possible.
and then seal her back up with red silicone.
I wonder if the old style carbs are having the same problem the jammin 1s were...that was a freakn nightmare

I have my setting just like yours...with the hsn in 1/2 from flush and lsn flush.