2019 Honda TRX90X Automatic 90X, A Great ATV Starts with a Great Engine. The TRX90X delivers smooth power, easy operation and rugged reliability thanks to its 86cc engine and no-clutch transmission. It s the perfect combination for beginning riders. Easy Starting. The TRX90X is equipped with an effortless push-button electric starter so there s never a hassle when it s time to ride. It also employs a keyed ignition switch, so you re always in control of who goes riding, and when.