I made clamps to mount standard round bars to my R1100RT. Worked great.
Made flat plates from 1/2" aluminum in the shape of the lower end of the cast BMW bar mounts. Made standard-type round bar mount clamps, again from 1/2" stock, bolted vertically to the new plates from below using recessed Allen bolts. Only used 3 of the 4 lower plate mounting bolts to allow space for the two vertical Allen bolts. Now you can choose any bar shape you want, although be sure to check bar-end and lever clearance to fuel tank, tank bag and fairing with steering at full lock. May need to consider limiting steering lock for use of your bar shape choice. I ended up with much shorter bars vs. the stock BMW's.
This is not a difficult or complicated task for a machinist, so enjoy the project.
Am glad am not the only one who wants to lower the bars rather than raise them!
I already have a used top yoke,, a set of clamps and a handle bar. Would just have to
plug the taped holes (weld them) and drill holes to fit the clamps. No big deal there.
I just thought that there may be someone that works/casts aluminum, and can make
a set of handle bars just like the original ones, just a couple of inches shorter. Can only
go so much shorter, as it will hit the tank. Also, I prefer the sturdy solid 2 piece handles
as opposed to the one piece pipe bars.
Once done, will post a picture and let you know if all this effort was worth the trouble
Can always return to the original bars, as am keeping all parts unaltered.