I'm more than a little embarrased how these pictures turned out, but you'll have to trust me when I say it will all turn out great when powdercoating, paint, polishing..... you get the drift. I need to light a fire under my ass to get this baby done!
The 400F setup is not a direct bolt on, but not terribly difficult either. The footpeg locating pins on the 500/550K frame need to be shortened slightly.
The 400 shifter shaft lever will contact the 500 sprocket cover, (the 400 cover is indented in this spot) the cover could be modified to avoid the contact. I think it's cleaner to relocate everything to the underside of the lever. ie cut off the tab on the lever & reweld inverted.
I made a 400 brake lever work by just heating & bending to fit, and will need to be rechromed. The original arm could also be shortened & made to work. I'm not using a kickstart so removed all those components.
The footpegs end up directly under the swingarm pivot, and directly under the riders mass, which helps in shifting weight on the pegs side to side. (rechecked, 4''back, .5" higher, and tucked in 1+") Rear sets that attach to the original REAR footpeg location are to far back for my comfort. Too much pressure on the boys on a long ride!
With the aluminum pegs the weight is somewhat less than the original setup, but certainly not as light as purpose built rearsets. I had all the goodies here and one thing led to another.
One pic is the complete 400 shifter assy & peg on the 500, the other two are what I've ended up with. Sorry for the length of all this.