  Using the transfer matrix in the angular-momentum space we investigate the
impact of trigonal warping on magnetotransport and scaling properties of a
ballistic bilayer graphene in the Corbino geometry. Although the conductivity
at the charge-neutrality point and zero magnetic field exhibits a one-parameter
scaling, the shot-noise characteristics, quantified by the Fano factor
$\mathcal{F}$ and the third charge-transfer cumulant $\mathcal{R}$, remain
pseudodiffusive. This shows that the pseudodiffusive transport regime in
bilayer graphene is not related to the universal value of the conductivity but
can be identified by higher charge-transfer cumulants. For Corbino disks with
larger radii ratios the conductivity is suppressed by the trigonal warping,
mainly because the symmetry reduction amplifies backscattering for normal modes
corresponding to angular-momentum eigenvalues $\pm{}2\hbar$. Weak magnetic
fields enhance the conductivity, reaching the maximal value near the crossover
field $B_L=\frac{4}{3}\sqrt{3}\,({\hbar}/{e})\,t't_\perp\!\left[{t_0^2a(R_{\rm
o}-R_{\rm i})}\right]^{-1}$, where $t_0$ ($t_\perp$) is the nearest-neighbor
intra- (inter-)layer hopping integral, $t'$ is the skew-interlayer hopping
integral, and $R_{\rm o}$ ($R_{\rm i}$) is the outer (inner) disk radius. For
magnetic fields $B\gtrsim{}B_L$ we observe quasiperiodic conductance
oscillations characterized by the decreasing mean value
$\langle\sigma\rangle-\sigma_0\propto{}B_L/B$, where $\sigma_0=(8/\pi)\,e^2/h$.
The conductivity, as well as higher charge-transfer cumulants, show beating
patterns with an envelope period proportional to $\sqrt{B/B_L}$. This
constitutes a qualitative difference between the high-field ($B\gg{}B_L$)
magnetotransport in the $t'=0$ case (earlier discussed in Ref. [1]) and in the
$t'\neq{}0$ case, providing a finite-system analog of the Lifshitz transition.
