do i need to rejet?

I recently did the throttle stop mod and uncorked my exhaust on a 2007 wr450, do i need to rejet because i now have less backpressure?

I recently did the throttle stop mod and uncorked my exhaust on a 2007 wr450, do i need to rejet because i now have less backpressure?

As said above, you need to rejet because they are jetted way too lean to pass federal emission regulations.

What is your elevation?

Did you open the airbox?

What do you mean by "uncorking" the exhaust? Did you just drill the "baffle within a baffle" or did you remove the whole stinger? Are the internal baffles in place or did you pull those too?

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