[jee7s]

I think most of us reading that need a bit more context, namely what types all of those variables are and where you tried to make your changes that didn't work.

Particularly:
1. What is the type of LeftMotors and RightMotors?
2. What is the type of Joystick1 and Joystick2?

If LeftMotors and RightMotors are a variant of a speed controller, and Joystick1 and Joystick2 are Joysticks, then code like this would work:

LeftMotors.Set(Joystick1.GetY());
RightMotors.Set(Joystick2.GetY());

And if you needed to reverse the right motors you would replace with this:
LeftMotors.Set(Joystick1.GetY());
RightMotors.Set(-1.0 * Joystick2.GetY());

But, like I said, a bit more context to your question would be helpful.