Every Evolution engine I've dealt with has required a proper break-in. Here's the process I follow and it seems to work very good for Evolutions:

Remove the limiters.
Run one tank through it sloppy rich at full throttle - like rich enough to 4-stroke the engine.
Tank two you run at full throttle and alternate between peaking the engine for 10 seconds and going rich to just breaking into a 4-stroke for 10 seconds. Repeat this process for the full tank.
Tank three - tune the high-end needle to about 400 rpm rich of peak, then adjust the idle mixture for proper transition. It's now ready to fly and finish breaking-in in the air.
You'll know when its actually broken in as it'll seem to fall on its face. Usually happens about 11 or so flights. When this happens, you need to change the glow plug and make sure the muffler pressure nipple is clear. Then fire it up and turn the high speed needle rich until it almost wants to fall out. Then set both needles to get 400 rpm rich of peak and a good transition. Then you're set to go and will rarely have to touch either needle valve.

Hogflyer