Im making a 2d unity game with a bike. I want to make it able to turn to left and right with wheel joints. Now i can only go right but now left. Please help me.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Pyörii : MonoBehaviour
{

	




	public WheelJoint2D frontwheel;
	public WheelJoint2D backwheel;

	JointMotor2D motorFront;

	JointMotor2D motorBack;

	public float speedF;
	public float speedB;

	public float torqueF;
	public float torqueB;


	public bool TractionFront = true;
	public bool TractionBack = true;


	public float carRotationSpeed;

	// Use this for initialization
	void Start()
	{
		
	}

	// Update is called once per frame











	void Update()
	{



		if (Input.GetAxisRaw("Vertical") > 0)
		{
			

			if (TractionFront)
			{
				motorFront.motorSpeed = speedF * -1;
				motorFront.maxMotorTorque = torqueF;
				frontwheel.motor = motorFront;
			}

			if (TractionBack)
			{
				motorBack.motorSpeed = speedF * -1;
				motorBack.maxMotorTorque = torqueF;
				backwheel.motor = motorBack;

			}

		}
		else if (Input.GetAxisRaw("Vertical") < 0)
		{


			if (TractionFront)
			{
				motorFront.motorSpeed = speedB * -1;
				motorFront.maxMotorTorque = torqueB;
				frontwheel.motor = motorFront;
			}

			if (TractionBack)
			{
				motorBack.motorSpeed = speedB * -1;
				motorBack.maxMotorTorque = torqueB;
				backwheel.motor = motorBack;

			}

		}
		else
		{

			backwheel.useMotor = false;
			frontwheel.useMotor = false;

		}




		if (Input.GetAxisRaw("Horizontal") != 0)
		{

			GetComponent<Rigidbody2D>().AddTorque(carRotationSpeed * Input.GetAxisRaw("Horizontal") * -1);

		}

	}
}

@yjann you helped me once before so can you help me again