Hi Robert:
I ordered both the M6 and the M8. They look like pretty high quality parts, I am pleased with them.
The M8 aftermarket rivet is, in my opinion, a much better replacement for the similar-size Honda rivets because it lies almost perfectly flat against the surface when it is installed. This makes the M8 ideal for use on the underside of the bike, right behind the front wheel - because it doesn't protrude, it won't suffer rock and dirt damage like the OEM rivet.
But, because the M8 rivet (which has the same shaft diameter as the OEM Honda rivet used in the two upper positions of the upper cowl near the base of the windshield) has a much larger footprint, it won't fit into the recesses for those two rivets. The M6 aftermarket rivet shaft is too thin to use in the two top of dashboard positions, but the M6 is a perfect fit in all the other locations on the ST 1300.
My suggestion to you is that you order a package of 10 of the M8 aftermarket rivets, then scarf two reasonably good looking (not banged up) OEM rivets from either side of the radiator - there are about 6 total in there - or from the bottom of the motorcycle - to use on the top of the dashboard, then replace the two you scarfed with the aftermarket M8 rivets.
Due to the flat surface area of the aftermarket rivet (when installed), you can expect a top speed increase of 0.00036 MPH after adding this farkle.
Michael
"Bolt Motorcycle Hardware" aftermarket rivets
