  Many GUT models conserve the difference between the baryon and lepton number,
$B-L$. These models can create baryon and lepton asymmetries from heavy Higgs
or gauge boson decays with $B+L \neq 0$ but with $B-L=0$. Since the sphaleron
processes violate $B+L$, such GUT-generated asymmetries will finally be washed
out completely, making GUT baryogenesis scenarios incapable of reproducing the
observed baryon asymmetry of the Universe. In this work, we revisit the idea to
revive GUT baryogenesis, proposed by Fukugita and Yanagida, where right-handed
neutrinos erase the lepton asymmetry before the sphaleron processes can
significantly wash out the original $B+L$ asymmetry, and in this way one can
prevent a total washout of the initial baryon asymmetry. By solving the
Boltzmann equations numerically for baryon and lepton asymmetries in a
simplified 1+1 flavor scenario, we can confirm the results of the original
work. We further generalize the analysis to a more realistic scenario of three
active and two right-handed neutrinos to highlight flavor effects of the
right-handed neutrinos. Large regions in the parameter space of the Yukawa
coupling and the right-handed neutrino mass featuring successful baryogenesis
are identified.
