Billy,
I have hauled 3 different bikes (including current KLR650) on 2
racks of my own making, on 2 different motorhomes. Also tried
hauling an XR250L on the rear of a F150, but felt it was too much
weight for that truck. In each case, I have installed 2 extra hitch
receivers on the motorhome, approximately in line with the frame
rails. I like the strength and stability of having 2 receivers for
support. I think there is just too much wobbling around of a rack
mounted on just one receiver. The first rack was made of 2 pieces of
3"x3" angle welded together to make a 6" channel. Very strong and
very heavy. People looking at the rack figured I was hauling a
Harley! Second rack was made with 6" aluminum channel. Much nicer,
much lighter, much more expensive

. In both cases I used a ramp
to load the bike. The ramp stores parralel to the MC channel,
between the channel and the bumper. Current ramp is about 8' long of
the same 6" aluminum channel. I have 2 crossbars bolted under the
channel to attach tie downs front and rear.
I can appreciate what you are trying to do with the jack, but I
think it will wind up being pretty heavy and for lack of a better
word, pretty wobbly. I am guessing that a rack as you envision, with
an equipped, full of gas KLR will be pushing 600 pounds.I like the
ramp myself, although I can't quite roll the KLR up it by myself on
the motorhome.
I think I have a picture of the KLR on the rear of my motorhome. I
could email it to you if you are interested. At any rate, good luck
with your project!
Tom
> I would agree with you that a KLR might be too heavy for a
motojack
> lift. However, I have zero experience with them, and thus could be
> talking out my a**.
>
> I come from the self taught school of welding , fabrication and
> repair, and probably tend to over-build things. But then after
> building several trailers and numerous ranch repairs and implement
> creations, I haven't had a failure or broken weld. I have fixed a
> bunch of store bought welded things that failed.
>
> So that is why I choose to build a hitch rack. The weight of the
bike
> with racks, guards, and accessories And the weight of
the "bombproof"
> future rack will easily be up near 500 pounds.
>
> That is the hitch tongue weight limit for a class three receiver,
but
> I have "reinforced" mine on the F350 years ago, so it should carry
a
> KLR on a rack OK. (fingers crossed, because if this fails and
dumps
> the bike, you will read about it here). If it works, viewing hours
> will be at the CMC at Canyonlands RV park camground.

>
> I would also like to hear from any one with any kind of hitch
mounted
> carrier with experience hauling a KLR or similar sized bike.
Please
> let us know soon before we start burning rods and wire.
>
> Billy in Dripping Springs TX
gonna
> go riding after work.