I just put 255s in my 2011 Streetglide 103 from factory. I have a FuelMoto PCV w his map in there. Bike runs ok. No popping or anything. I have dual exhaust. The front cylinder sounds like a single cylinder engine and the rear has a nasty lope like an old harley. Bike runs fine, oil pressure good, no unusal sounds. I pulled cam chest and sprockets today. Timing marks all line up. Using stock rods. I also did compression test by jumping 12v to starter relay. Got 170/170 .I didnt think this was a characteristic of this cam. Dont know if its tune or something else. I can send video to hear it if youd like. Thanks in advance

 

Something's not right!
255s should crank over 200#
Bob

 

Well i figured out that was with dead battery. I jumped bike to my truck and i got 200/200. So i duno

 

Unless you take it to a tuner you will only be guessing at the tune (calibration).
Well worth having the EFI recalibrated precisely for the change in airflow through the engine and exhaust.
The 255 is a good cam that will tickle your fancy after being tuned properly.
Bob