My bike came with a K&N big air kit. I contacted K&N and they tell me....
"Thank you for contacting K&N Engineering. We understand you're looking for more information regarding the installation of the RK-3925-1. The RK-3925-1 installation instructions do specify that you MUST use a carburetor recalibration kit. Upon installing this product, you must re-jet your carburetor."
I did look up the installation instructions on the K&N web site and it does say that a recalibration kit is required at the top of the installation sheet but they don't say what one consists of or how to install it.
I guess my question is.....Replacing pipes requires re-jetting to a certain size jet with a stock air cleaner. If the BAK
is installed, do I need to re jet again to an even bigger size jet?