More Info about rejetting with aftermarket air filter
Q:
I just replaced my stock filter with a new Twin-Air filter and was wondering if I need to make any jetting changes because of the swap?
A:
As long as you just replaced the filter and did not make any other modifications to the airbox or exhaust, the stock jetting will be just fine. The same goes for the K&N and No-Toil filters as well. Just swapping out the filter will not require any jetting changes.