Will they follow the original path they were before you cut them? If not may have to refab them to go over the rad, but make them removable so you can make taking the rad out for repairs easy. Something else I see you might do for some pretection is build a rock screen out of some small grid expanded metal, and might but flairs coming back at a angle according to how far the wheels turn in might keep some dirt and stuff out of it. Unless you are behind another rider throwing a bad ass roost that rad might not get that dirty, just make a routine deal after every ride back flush it, water from the backside out the front to flush the dirt out.
