I plan to swap out the OEM risers on my 07SM for a set of 4" risers with 1" to 1.5" pullback. H-D risers are a possibility. I prefer not to drill the top tree.

Can anyone recommend a source & specific riser adapter that will work with Harley pattern risers and the SM tree?

Anyone know what size & pitch the 07SM OEM riser studs are?