Helmet lock bolt size/thread pitch?

I need to know what size and thread pitch, the small bolt for the helmet lock is? PO removed it and the bolts, so I don't have them. They are two different size bolts, I have figured the big one out, but can't find anything that screws into the smaller hole. Thanks for any help,,,

ETA: It's a WR250R,,,

The big counter sunk bolt is 6mm I believe standard pitch.....

the other hole is for the pin on the back of the lock mechanism itself....



http://www.partshark.com/oemparts/a/yam/54205a86f87002132cdd6d4d/frame



If I understand you correctly.