Ah, you call \Honda\Main, but your controller is called Controller_Main. Two different class names, so that is not going to work as I wrote.
So it should be \Honda\Controller_Main.
But calling classes cross module isn't exactly best practice, and can lead to all kinds of issues. The most famous one is "call context". In your case, the "call context" is "\Main", even when you're in your Honda controller. Which means you will not be able to load views, config or lang files from that module, they will not be found.
It is best practice to use an HMVC call to call a controller in another namespace.