How to change maxForwardSpeed from C#

I need to increase character's max speed and max jump height on certain conditions. How do I access the properties of CharacterMotor from C#? I have this script attached to the Character Controller: using UnityEngine; using System.Collections;

 public class Shadow : MonoBehaviour {
     bool sh;
     public ParticleSystem particlesystem;
     CharacterMotor cha = GetComponent<CharacterMotor>();
     cha.movement.maxForwardSpeed = 30;// I need help HERE!
     // Use this for initialization
     void Start () {
         sh=false;
         particlesystem.enableEmission = false;
     }
     
     // Update is called once per frame
     void Update () {
          if (Input.GetKey(KeyCode.Q)) {
             if (sh) {
                 sh=false;
                 particlesystem.enableEmission = false;
                 gameObject.GetComponent("Character Motor").movement.maxForwardSpeed = 15;//This is bad
                 gameObject.GetComponent("Character Motor").CharacterMotorJumping.baseHeight = 1;//This is bad
             } else {
                 Vector3 fwd = particlesystem.gameObject.transform.position - transform.position;
                 Vector3 pos = new Vector3(transform.position.x,transform.position.y,transform.position.z);
                 RaycastHit hit;
                 if (Physics.Raycast(pos, fwd,out hit, 100)){
                     sh=true;
                     particlesystem.enableEmission = true;
                     //Debug.Log(hit.collider.gameObject.name);
                     gameObject.GetComponent("Character Motor").movement.maxForwardSpeed = 30;//This is bad
                     gameObject.GetComponent("Character Motor").CharacterMotorJumping.baseHeight = 5;//This is bad
                     
                 }
             }
         }
     }
 }

Unity cannot assign 30 to maxForwardSpeed, it says:

Unexpected symbol `=' in class, struct, or interface member declaration