The Saito recommendation is very do-able, it says 1/4 to 1/3 throttle opening and 4,000 rpm for ten minutes. The Saito recommendation has never been to run it wide open and richened down to 4,000 rpm, the engine would be so cold and wet it would never break in. And they certainly don't recommend the warm it up and shut it down ten times method. I have broken in about 15 Saitos and several other fourstrokes using Saitos 40 minute procedure and all turned out perfect.