2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192025We analyze some unphysical features of the geodesic approach to matter coupling in a compactified Kaluza-Klein scenario, like the q/m puzzle and the huge massive modes. We propose a new approach, based on Papapetrou multipole expansion, that provides a new equation for the motion of a test particle. We show how this equation provides right couplings and does not generate huge massive modes.4 pages, to appear in Proceedings of the II Stueckelberg Workshop - Int. J. Mod. Phys. AGeneral Relativity and Quantum Cosmologytext