New Exhaust....

[HDSlicer1]

Hi everyone, I have a question. I have a 2018 Road king and just put Vance and hines big radious on along with a stage one air kit. I know I need a tune but when I start it up it revs to like 4500 rpms . Is that normal  till I get it tuned ? Thanks guys !!!!

[boooby1744]

No

[rigidthumper]

Do you have a tach? Did you change the air cleaner, too? Chances of the bike going to 4500 @ startup is extremely slim, unless you have a hand on the throttle, or a severe intake leak.  Check the plastic intake manifold & seals for issues.

[HDSlicer1]

Thank you.

[Hossamania]

I agree, 2500 rpms is a lot, 4500 is damn near runaway motor territory. If that motor is going to 4500 rpm, you have some serious issue.

[Pirsch Fire Wagon]

You have most probably dislodges the Intake Seals when installing the Stage-I. Remove and torque the Intake Flange's.