Clamp Kit - PHDS - Yamaha The PHDS (Progressive Handlebar Dampening System) is a system mounted on elastomers that absorbs vibration from the motor and chassis, In addition, the system dampens the forces acting on the handlebars in the horizontal and vertical directions, while maintaining steering precision, Depending on the type of mounting on the triple clamp, there are many possibilities for handlebar adjustment and adaptability to the needs of each rider, Through exchangeable elastomers, the hardness can be adjusted individually (soft - green, medium/standard - yellow, hard - red)