For the break in leave the limiter in place...Doesn't evo say no break in required?......as a new owner it will ensure that you don't run the engine too lean.
However the evo engines I've tuned just can't seem to get tuned with the limiters in place. after break in what you do is (hgh end) lean out the engine to max RPM by sound.....more lean and RPM drops, richen and RPM drops...this is peak...now richen 1/8 to 1/4 turn...this is where you want to be as the engine will lean out in the air.....
the best thing to do is get wit an experienced flier to help you..not only about the tunning, but everything RC