Start out with much oil in the mixture, about 1:25 of any good two stroke oil.
Set the engine slightly rich, but still peaked. It should fall into fourstroking when you reduce throttle, then go into two-stroking again.
For the first pint, keep the 1:25 mix, and do not exceed 5000 rpm using a 18x10 prop. Play the throttle.
Then switch to 1:30 for the next gallon. Do not ask the engine to work hard for prolonged times. Gas engines do not like that when still tight. Believe me, MVVS are tight engines. Working the throttle a lot, and up to 6000 rpm will limber up the engine a bit.
Now switch to 1: 35 for the next gallon, tune and ask for max power for short bursts, which may be prolonged bit by bit. Keep playing the throttle.
The third gallon can be mixed 1: 40. That is the mix I still use, and I intend to use it for some time to come.
My engine starts running better and better. I use Menz !8x10 and 20x8 props.