I saw a used trailer hitch on ebay today for cb750.
Last year I went on vacation via bike, one of the guys in my group was on an Ultra Classic and he pulled a trailer. It was a cheap HarborFreight unit, narrowed to the width of a cooler. He said the wide trailers kill his mileage, the narrow one is no wider than the bike and barely affects his mileage. Plus, the coolers are mostly weatherproof, and wheel easily in and out of motel rooms. I have considered building a single wheel trailer similar to this
but lower, since it would be pulled by a street bike.
Here are some pics of the boxes themselves for the interested parties.
under the lid
inside the box
Notice the lack of weather proofing around the lid, and the small hole in the bottom presumably for the wiring to come out.
The lock. Once unlocked, the key can not be removed, nor is there anything holding the lid closed when unlocked. (No latch)
the outside outside
Inside outside. The tubes that circle the box are left open at the ends. I can't tell how far inside the chrome goes, but it wouldn't surprise me if they rust.
These are two of the brackets they give you to mount them with. I don't know what they expect you to do with them.
I changed my oil and filter tonight, and installed my freshly charged three year old battery. It was dead. I cobbled in my Buell battery and the old girl started. I don't have plates on it and I need to air up the tires, so I didn't ride it anywhere.
After this, there may be another project to dink around with. (Can't turn down a free bike, can I?)