Going off of memory, but I believe the hinge is .125. You throw that pin our and replace it with an .090. Double check those numbers.
Or, you can take your larger pin, chuck it up in drill motor and while running the drill, taper the pin on a fixed disk or belt sander. Mark the pin where the bend starts and start the taper a bit ahead of that down to the end. That makes for a tighter fit over the top and reduces the "pillowing" you get due to air pressure in the cowling. Works very well.