I have used all tips mentioned above, and they all work. Main thing I have come to notice is don't expect a lot till you get a gallon or 2 thru any four strokes. I do recommend you run a 10% nitro ,castor/syn, blend with at lest 18% oil . Break in as Magnum manual recommends .
ASP/Magnum weak spot is a sloppy fitting HS needle , I used largefuel tubing on a coupleand it has do the trick nicely.