Look here to decipher what your motor is.
http://www.mortec.com/
For suffix codes on the front pad look here.
http://www.nastyz28.com/decode.php
On your secondaries. The air door won't pop open much if you stroke the throttle while parked and looking at it, if that's what you mean.
I see the weather has been crappy out there. Have you had snow yet?