Originally Posted by GearNut
If you keep them small they will not interfere much with the air flow.
Mine are about 3/8" wide and 1/4 inch deep.
All of my modern dirt bikes came with them from the factory and none of them have issues with overheating, even when playing in the mud. High RPM and low MPH.
Very good. I will add this to my task list for tomorrow. I will follow your dimensions as well. Thank you.