Dnepr and Chang Jiang were two simmilar bike/sidecar versions of a militarily used platform, the Jang being Chinese, while the Dnepr's being imported here probably by GI's overseas or some such way. Though I believe both were grey-market types. Neither were of the quality of the Ural, and I believe based on a flathead design motor and three or four speed. If I'm remembering right, three forward and a reverse. These bikes in my estimation are cool, for what they are, but not a daily driver as such, and the reliability was suspect, though I believe the Chinese Chang Jiang, a bit superior in reliability, believe it or not. I must say this is all speculation, from stories told from this guy or that who claimed to have had them. I would not look for or aquire either of these off-brands, as the parts thing would surely cause much greif.
Below are pictures of the Dnepr and Chang Jiang. At first glance....all these bikes look alike....and that is largly because the design was jacked from BMW for the most part, and in the Chang Jing, if I'm correct, part for part. Of the two I'd take the Chinese version, parts are STILL readily available, and only just a little bit difficult to locate and buy. Dnepr, well beyond the obvious appearance, I honestly know little mechanically, but am led to believe they rate third.
I gather that these bikes, or should I say the Chang Jiang is the sort that could have a hole in one piston, leak oil by the coffee cup, smoke and rattle, be draging parts and still get you there