to have the rear seat constructed just as the front one seat 10 includes a base in the form of a pan 16 that attached to the frame of a motorcycle foam cushion material 18 defines the back seat foam material of the front seat defines a horn 20 lateral wings 22 and 24 seat base or bottom 26 and seat back 28 seat wings 22 and 24 provide lateral support to the buttocks of a rider with reference to fig2 and 3 flat sinuous form springs 30 and 32 pass beneath the seat base and bend up and laterally out to form the base of wings 22 and 24 each spring extends continuously from within one spring to within the other as shown the springs resist deflection of the wings laterally and downwardly the springs are bent to suit the particular requirements of a rider as at 34 and 36 in fig2 the gauge of the springs can be varied to the same end the stiffness of the seat or conversely the amount of give of the seat can be changed by changing the position of the bends of the springs thus determining the length of the springs abutting against pan 16 by having the bends closer to the center of the pan more free spring above the pan is presented and the stiffness of the system is reduced while its give is increased in other words the amount of free spring and the load supported by the spring can.