I am the new owner of this Terraplane. Yes, it came with the original owner's manual, plus a supplemental manual (basically a troubleshooting list), and hardware mounting instructions for the Yamaha XS1100 and the Kawasaki KZ1100.
As I have found, the original owner's manual is already available online in pdf. But, if anybody would like the two instruction manuals, or the supplement manual, I can scan them and post them here in jpeg.