ORIGINAL: asmund
tomorrow I will fly my MVVS .49 on two different fuels (5% and 0%) and carefully note tach readings. When I come home I`ll pull out the sleeve and Dremel on the 3 nice big ports and chamfer the lower edge around the sleeve. It worked on my ASP so I think it will work on my MVVS also. Time will tell.
Asmund,
If you do any of this, you would lose your engine's warranty.
So just make a note of that, if something fails to run as you expect it to.
I suggest that you wait with your engine, until it develops its maximum performance potential, on its own.