It is shown that kink distortion of the magnetic axis, and as a consequence a variation of the magnetic field along magnetic surfaces in the toroidal direction, leads to a new type of "superbanana" particle orbits and can change drastically the classical particle and heat transport in the central core. The phenomena discussed below have a time scale of ~10­3s. and seem to be too slow to affect the sawtooth crash process (which is an order of magnitude faster) but can dominate in evolution of the plasma parameters between crashes, "snakes" formation and other phenomena in the central plasma inside q = 1 magnetic surface.