Originally Posted by mduff
....The concern being the combined weight (motorcycles plus tongue weight). My plan is to remove the tailgate, or support on an angle when carrying the bikes; when open as shown in the picture it rests on the TT jack crank handle.
My truck is a Sierra 2500 with the regular bed (6' 6") so when I have one bike in it I have it diagonally so I can leave the tailgate on (and have the tonneau cover on after unloading the bikes at the detination). When I take two bikes they are straight in and rest partly on the bed and the tailgate so I remove the tailgate. I thought about trying it in the partly open position but when I turn on full lock, the trailer would contact the tailgate so it's not practical.
Regards the weight of the bikes plus the tongue weight. With a weight distributing hitch, most of the tongue weight is transferred to the front wheels (that's why the truck stays close to level with the trailer attached) so the loading isn't as much as it first appears.
I find it makes no noticeable difference when towing with or without the bike(s). I take either my DR350 and the Dakar, or just the DR650 so the weights are similar to your KLR's (which I previuosly owned).
You can take your truck to the weigh scales before/after and with/without the bike(s) to see how much weight is on all sets of axles. I would suggest setting up the hitch and WD bars with the bikes loaded on the truck.