It takes very little effort to change the direction of a motorcycle.
Motorcycles steer via counter-steering (this behaviour is exhibited above 15 km/h, approximately). Counter steering is used by single-track vehicles (bicycle, scooter, motorcycle) to initiate a turn toward a given direction by momentarily steering opposite to that direction. This is because to initiate a turn, the rider and motorcycle must lean in the direction of the turn. This leaning is caused by steering briefly in the opposite direction. Once the required lean is established to sustain the turn, the rider then steers into same direction as the turn to complete the turn.
NOTE: Please don’t push the handlebars with force. Apply very light pressure.
Take a look at the following videos:
The science behind counter steering
Counter steering demonstration