Wr 426 new exhaust

Hey guys. Fitted a new Arrow exhaust to my Wr426 this afternoon and I couldn't believe the difference it made. More power right throughout the rev range and less bog down low, not to mention the sound. Anyway just wondering if its necessary to rejet after fitting the new pipe. If anything the bike seems to run better now, but I don't want to ride it for too long if it should be retuned to suit the new pipe.

Let us know what you think.


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