2012 ZX10R blocking plate

I remember reading somewhere about blocking a "2nd air" when fitting an aftermarket exhaust to my 2012 ZX10R.
Have you guys all done this? If so how did you do it and where did you get the blocking plate?
Had mine flashed but it's still getting stuck when the throttle is only slightly open.
Feels like it's getting puled back as I am just opening the throttle then it just takes off. Anyone else having this problm?
Thanks
Have you guys all done this? If so how did you do it and where did you get the blocking plate?
Had mine flashed but it's still getting stuck when the throttle is only slightly open.
Feels like it's getting puled back as I am just opening the throttle then it just takes off. Anyone else having this problm?
Thanks