The bolts that secure the handlebar top clamps down to the risers....standard M8 bolt, correct?
Saw your post right after I posted mine. Great minds think alike.That bolt part number is 91314-08025-00
The Yamaha microfiche shows the bolt size, you just have to know how to read it. Here is how it works...
The part number is broken down into 3 parts 91314-08025-00 is an example.The first part of the part number tell what type of part it is such as bolt, screw, washer etc. The second part, which is 08025 tells you the size. That bolt is 8mm in diameter and 25mm in length. If the second part was 08024 the bolt would be 8mm in diameter and 24mm in length. And last 2 digits generally determines the finish such as black, cad, etc"