At 16:24hrs units were dispatched to the reported motorcycle versus car MVA in 12800 block of S. Kirkwood. Upon arrival of Engine 22 (Ramirez) and Battalion 21 (Magana) a motorcycle rider with critical injuries was found in the roadway. Immediately requesting air medical the crew began patient care until arrival of FBCEMS Medic #10 and Battalion 2 (Lane). Upon arrival of Memorial Herman Life Flight patient care was transferred and transport made to the Level I Trauma Center in the Texas Medical Center. During the incident Engine 21 (Cyrus) was assigned the Landing Zone responsibilities and Stafford PD assisted with traffic control. The cause of the accident is under investigation by Stafford PD.