Re: 4 stroking
I don't use "jet size' because they don't seem to be consistent. Instead I use drill bit size. As I said I solder the jet orifice closed then redrill them to give me the best performance.
My drill set is in one thousands inch increments. Different engines respond differently. I use anywhere from a .024 to a .026 drill size. However I also run Opti-2 oil at 100:1 ratio. That means I must reduce my fuel to air ratio more than if I were running standard 2 stroke oil at 32:1. When you reduce the oil content in your mix you must also reduce the fuel to air mix.
Complicated, I know but it will all make sense eventually.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"