exhaust butterfly valve removal

[2005multi]

Can this thing be removed? Im thinking its the reason for the wisspy exhaust note thru my zard slipon

[PKM]

Originally Posted by 2005multi

Can this thing be removed? Im thinking its the reason for the wisspy exhaust note thru my zard slipon

Yes, it can and should be removed (weight/airflow/sound, etc). A full system, like the Zard collectors, replaces the stock "S" pipe and removes the flapper valve assembly entirely. If you don't have a DP ECU (from 2-1 or 2-2 Termi kit), you will get a DTC error after you remove the butterfly valve - motocreations offers a reasonably priced solution, which fixes the CEL error and lets you remove the funky actuator thingy under the seat : http://www.motocreations.com/electrical.asp

If you have a DP ECU, the butterfly valve is already inactivated and you shouldn't receive an error code after it is removed.

[NYSport]

Try a "search" there are several threads regarding your question.