If your custom KPI view is a classic view (file inside modules/ or custom/modules/) this is VERY easy to do. Just copy your classic view file to custom/modules//index.php and your view will be the default for that module.
If your custom KPI view is not a classic view could create a custom view file in modules/views/view.list.php to display your view instead of the normal ListView (or maybe even both your view and the list). Or simply create a file custom/modules//index.php that display your custom view.