Raptorizing allows most people full relief instantly, and the problems don't come back later to haunt them.
The very few folks who have other issues with carbs full of crap or tanks full of crap repeatedly passing it on to the carb, they can now readily recognise their remaining issues once the Raptor removes all the muddy water from the system (without the built-to-fail vac petcock"s multiple symptoms screwing up every attempt at diagnosis).
A large pleated paper fuel filter is a good thing to have on your bike -- prevents a whole world of little carb screw ups over the years.
Take your air filter out completely and run the bike a quick trip down the road to see if the symptom disappears. Avoid dust clouds while you do this, obviously.
A really buttfugly plugged up stock air filter can cause some surging too.
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But then again, we do have at least two folks who LIKE the vac petcock.
And they certainly will lose no opportunity to say "I told you so" if a bike has new issues that can be recognized now that the vac sucker is gone.
Why? I dunno. All bikes get new symptoms and new issues as the miles build up. It is what the bikes do.
I just don't care for fixing the SAME SET OF ISSUES repeatedly. Me, I prefer to remove them permanently rather than deal with them again and again.
sending them in to look for the little spider doing pushups on the main jet again, aren't we?