Just got this yesterday in NYC. I believe I'm the fourth owner. It's an 84 with 82000 miles on it. It apparently has had a conversion to an R100 engine. It was listed as an R80 though. I can confirm that it is 1000cc off of the cylinders but am having trouble finding any other engine ID. Hopefully I can get the details so a rebuild is hassle free.
Awesome bike! Corbin is about to be ditched for a stock seat, however. VIN #2933
Not my house. Too regal.