I know the original owners son, who offered it to me. His Dad bought it new, along with the Factory Racer bodywork. He collected a lot of parts over the years...last registered in 89. His son told me the motor was built by CNW but recent contact with Matt shows it wasnt. At any rate, his health failed as well as his son's so, rather than let it sit, he knew my history with vintage bikes so he called me...took me a pair of seconds to make up my mind ;-).
The motor appears to have been apart at some point..the plan is to service it, get it running, pull it out, strip the bike down for whatever and back together as a factory race replica..