Not that I know off , there all much the same thou to 81 and then there really isn't much difference until water cooling.
There is little or nothing that goes wrong with them ( apart from 40 year old motoplates ) Try and make the bing work as they run better with them once you know the secrets.
If you take the bike to CD8 bring it over to my camp with some beer and Ill share what info I do have on set up.
