A tilting saddle motor vehicle with lightened rolling four-bar linkage

The tilting motor vehicle comprises a pair of steering front wheels (17A, 17B), linked to the frame (3) of the motor vehicle (1) through a rolling four-bar linkage (21). The rolling four-bar linkage comprises an upper crosspiece (23) and a lower crosspiece (25) linked to each other by uprights (27A, 27B) forming the rocker arms of the four-bar linkage. One of the two crosspieces consists of a front half- crosspiece and a rear half-crosspiece, both hinged to the two uprights. The other half- crosspiece comprises two half-crosspieces, only one of which is hinged at the ends thereof to the two uprights, while the other half-crosspiece is shorter, and it is not hinged to the uprights.