The link I did, WAS ment for the towing part of equation. Assuming the upper tube would hold the bike.
Putting an extended 2" bar a foot or so is not an issue. I was given one 18-24" for my equipment to tow with my Navistar from the bed manufacture. This got the ball mount beyond behind the flaybed. Needless to say, the first time someone forgot to remove the mount, dumping the bed. Mount and bed were bent. I've stuck with as short of mounts as I can since. No issues with the bed hitting the mount dumping.
I'm of the opinion, yes opposite of mkirsh, not holding his NO against him, this can be done, safely and sanely. It will take some ingenuity with a welder etc.
I would also derat total trailer rating from 10k lbs, by the hw percentage divided by bike and it's components. Say total 300 lbs, that's 3000 lb derate of trailer capacity. It appears like he's towing a max 3000-5000 lbs of trailer. IMHO below ratings overall.
OP will still have to deal with unloading part of FA with that load behind. A stiffer higher capacity spring pack could alleviate that part of the issue.
Reason I say this, is my ET with 1500 lbs of HW, with Navistar 16k rear suspension loses less that 100 lbs off the FA. My dually 3500 with an 8500 rear springs, lost 300 lbs, and a SW 3500 WL 6400 lb springs lost 400. Latter truck handling issues were felt due to amount of the FA.
My background etc on where my brain is going with this.
I'm probably more positive on a solution than some are.
Marty.
