Problem with Mouselook script

Hello, I'm trying to get this mouselook script to work, but whenever it gets to a rotation of zero, it resets to the positive clamp value (Note: I haven't implemented input yet, I've been using Update to test it)

Script:

 using UnityEngine;
 using System.Collections;
 
 public class PlayerMouseMovement : MonoBehaviour {
     PlayerMain MousePlayerMain;
     public GameObject PlayerCamera;
 
     public float YClampMax;
     public float YClampMin;
 
     public float XClampMax;
     public float XClampMin;
     
     public bool YInverted;
 
     public int XSensitivity;
     public int YSensitivity;
 
     void SetReferences()
     {
         if (gameObject.GetComponent<PlayerMain>() != null)
             MousePlayerMain = gameObject.GetComponent<PlayerMain>();
         else
             Debug.LogWarning(gameObject.name + " does not have a PlayerMain script!");
     }
 
     void Input()
     {
 
     }
 
     void MoveXAngle(float amount)
     {
         if (XClampMin != 0 || XClampMax != 0)
         {
             float r = amount + gameObject.transform.rotation.eulerAngles.y;
             r = Mathf.Clamp(r, XClampMin, XClampMax);
             r -= gameObject.transform.rotation.eulerAngles.y;
             Debug.Log(r);
             amount = r;
         }
 
         gameObject.transform.Rotate(new Vector3(0, amount, 0));
     }
 
     void MoveYAngle(float amountY)
     {
         if (YClampMin != 0 || YClampMax != 0)
         {
             float b = amountY + PlayerCamera.transform.rotation.eulerAngles.x;
             b = Mathf.Clamp(b, YClampMin, YClampMax);
             Debug.Log(b);
             b -= PlayerCamera.transform.rotation.eulerAngles.x;
             amountY = b;
         }
 
         PlayerCamera.transform.Rotate(new Vector3(amountY, 0, 0));
     }
 
     // Use this for initialization
     void Start () {
 
     }
     
     // Update is called once per frame
     void Update () {
 
     }
 }

Thank you in advance.