Moto Jet Assembly Kit. The Moto-Massage is a jet that automatically travels up and down to massage a person’s back. The intensity and speed of the Moto-Massage can be adjusted with the air control valve. The Moto-Massage is curved to fit the curvature of the back and designed in warm grey. The Moto-Massage consists of a jet nozzle, water tube, threaded fitting, vertebrae and an air tube with o-ring. Compatible with 1989 to current Hot Spring Highlife spa models.