From the AMA:

MAT MLADIN & TOMMY HAYDEN GROUP A QUALIFYING TIMES DISALLOWED

DAYTONA BEACH, Florida - All of the qualifying lap times for #6 Mat Mladin and #22 Tommy Hayden were disallowed from the Friday Group A Superbike qualifying session at Road Atlanta for use of non-homologated crankshafts.

Both riders will have the opportunity to participate and post lap times during the Saturday morning qualifying session.