  We propose an efficient method to explore models which which produce
like-sign tops at the LHC, using the total charge asymmetry of single lepton
events instead of like-sign dileptons. As an example, the method is implemented
on a Z' Model, which can explain the top pair forward-backward asymmetry at
Tevatron. We show that a large region of the parameter space of this model can
be reached using the existing data set at the LHC.
