No, weight does not affect the speed of a maglev train. Maglev trains use electromagnetic force to levitate above the tracks and propel themselves forward. The levitation force is generated by the interaction between the magnets on the train and the metal rails on the track. The weight of the train does not affect the strength of this magnetic force, so it does not affect the train's speed.

The speed of a maglev train is primarily determined by the power of its motors and the design of its aerodynamic body. The motors provide the thrust to propel the train forward, while the aerodynamic design reduces air resistance and drag. The weight of the train is not a limiting factor in its speed.

In fact, some maglev trains have been designed to carry heavy loads, such as freight or automobiles. These trains may be heavier than conventional trains, but they can still achieve high speeds due to the efficient use of electromagnetic force.