  Nucleon $\to \Delta(1232)$ transition electroweak form factors are discussed
in a single pion production model with nonresonant background terms originating
from a chiral perturbation theory. Fits to electron-proton scattering $F_2$ as
well as neutrino scattering bubble chamber experimental data are performed.
Both $\nu$-proton and $\nu$-neutron channel data are discussed in a unified
statistical model. A new parametrization of the $N\to\Delta(1232)$ vector form
factors is proposed. Fit to neutrino scattering data gives axial mass
$M_{A\Delta}=0.85{+0.09}{-0.08}\;$(GeV) and $C_5^A(0) = 1.10{+0.15}{-0.14}$ in
accordance with Goldberger-Treiman relation as long as deuteron nuclear effects
are considered.
