Well I'd bet the vast majority of those installed by the dealers are NOT scrutinized at all, but bolted on and run.
I would HOPE I'm wrong
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I doubt your are wrong....first most Techs wouldn't have the tools, or the expertise to check them. No knock on Harley Techs, but most if not all believe if Mother Harley sent the kit, they do all that. All that is needed from them is to change the parts. They are allowed a flat rate time to complete the job. The only way it gets checked, is if something is obviously wrong, and it wont go together correctly.
Private shop is different, their butt is on the line and their reputation is at stake. They don't have the luxury of saying "its a high performance motor, with race parts installed, what do you expect they all do that"
Again not knocking Harley Techs, their are lots of good ones out their, but most of them are not experienced at modifying these motors.