On a 2012 Bonnie SE , if I add a K & N air filter would I need a new tuine? Other than this the bike is stock. Also, if I removed the snorkel would I need a new tune?
Try a Uni Filter they flow more air than K+N's do. I don't think there is enough of a change to require a new tune. When I did the same with my carb'ed T100's I didn't have to rejet the carbs.
And once you notice the difference removing the snorkel makes let's see how long it takes for the air-box baffle to come out, AI & O2 removed, exhaust, tune........ It's a slippery slope - enjoy the ride
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