The ability of sterile males to survive, disperse, find, and mate with wild females is key to the success of sterile insect technique (SIT). The Release of Insects carrying a Dominant Lethal (RIDL) system is a genetics-based SIT strategy for Aedes aegypti. We examine two aspects of insect performance, flight potential (dispersal ability) and teneral energy reserves, by comparing wild-type (WT) males with genetically-modified lines carrying the tetracycline-repressible constructs OX513A and OX3604C.