The Yamaha part number differs left from right. I believe the right side is longer but I don't have a way to verify. These Yamaha part numbers don't fit the format that indicates diameter and length.
Item 26 left side 90111-10010
Item 36 right side 90111-10011
What I know from around here:
Stock is 10mm x 25mm with thread pitch 1.25. For those who are removing the passenger pegs and installing covers then use 20mm length. Either way, these are readily available in hex head. If you want button (allen) head then shop bolt houses online. Stainless is nice.
10mm is correct. For length, well, I do not know if the parts manual is wrong.
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