What is the primary physical technique used to initiate a quick turn or swerve on a motorcycle travelling above 30 km/h?

1. Counter-steering (kontra-upravljanje) by pushing forward on the handlebar grip in the desired direction of the turn
2. Pulling forcefully backward on the handlebar in the direction of the turn
3. Shifting body weight only without applying any steering force to the handlebars
4. Applying the rear brake firmly to lock the rear wheel into a slide