Originally Posted by highlandchef
I'm sure it may be possible but I think there are a few issues you'll need to overcome:
1. The weight of the bike. Your bike is 500 lbs. That's right at the tongue weight max for most of the commercially available front hitches. There may be heavy duty options available but you could be looking at serious money. You will also need to beef up the front springs. They weren't designed for that extra weight.
2. Lights. Your bike will probably block your headlights, markers and front license plate (if your state has one). Similar to a snow plow, you will need to fashion a set of auxiliary lights.
3. Airflow. Even if you solve the above two it still may not work. A bike like yours could significantly affect the airflow to your radiator. Since you will be using this set up while you are towing you may not have enough airflow to properly cool the engine when it's under extreme load.
It might be possible, whether it can be done without major engineering I don't know.
I think you might be better trying something else. You could brace the tailgate; they make kits to brace the tailgate to allow extra loads. The other possibility could be a headache rack. I remember driving to FL; I saw someone with a camper and he had his bike on a ramp that went from the bed to the headache ramp. It was quite an angle but the mounting looked solid and didn't seem to be shifting at all.
^^^All of these^^^
The ramp/headache rack idea for the bed is good.
How far up will the tailgate go if the bike is loaded diagonally in the bed? Namely, front wheel tucked right into one of the front corners of the bed?