First, go to Shoptalk, over on the right, and hit the two links for the OE Hondaline bag rail instructions.
http://www.valkyrieriders.com/shoptalk/Manuals/BagRails1.pdfhttp://www.valkyrieriders.com/shoptalk/Manuals/BagRails2.pdfThere's a parts list including all the bolts and sizes (though it only says
spacer, for underneath. I went to a hardware for a few stainless pieces, with stainless washers and bolts in lieu of Hondaline chrome flange bolts. I have a mixture of each on my bag mounts, and it is unnoticeable, unless you are looking for them. I bought three length spacers and one of them was good. Closer to a quarter or third inch than half inch.)
It's been years since I did this, but what you don't want to do is reuse the existing length chrome flange bolts, after you add the bag rails to the mount points, because these existing bolts now no longer tap all the way through the mount points; they are too short and only tap a bit, and lack strength in a tip over or fall and slide.
If you open a parts fish on the OE bags and mounts, you can discover the length of the relevant bolts. If you compare those to the Hondaline bag rail parts list, you will discover several of the main sturdy mount bolts are like a quarter to half inch longer (than the OE bolts) to fully tap at the mount points, after adding the bag rails to the equation.
With the correct length bolts installed, you can have the bags off, and jump up and down on the bag mounts and rails, and they are not going anywhere.... though the bike might fall over.
The only other thing I recall from my installation is that I turned the clip-clamps used to secure the hardware that wraps around the back end of the rails, around-or upside down as they were easier to mount that way, and again are not visible unless looking for it.
Once you have your parts list and right sizes, you find a good hardware that stocks stainless. Not Walmart, and maybe or maybe not not Home Depot. I went to an old school hardware store that had it all.
It could be done on line too, but I took my OE flange bolts in with me to double check what I was getting.