Oil on pistons?

So if any one has suggestions on how far down I need to go down on jet sizes will help tremendously for a start. Primary is already at 70 from factory.
Jet sizes are not where to start. You need to begin with the idle circuit. That would be the idle fuel restrictors and such. Get those close and then finish the tune with the idle and high speed air bleeds on top of the carburetor. Those carburetors are incredibly tunable. They can be tuned to run on a 4 cylinder.