Ris is no more Ricky runs a bar in Corona now. Still sells streatbike bagger stuff under a new name. I've known Ricky as an occasional riding budy in the group I go to Glamis with. When his dad died I don't thing the rest of the family was prepared to handle the company. Sad story.
Run the radiator hose from the clutch cover to the cylinder head to create a closed loop. There's a nipple on the cylinder head that's a vent, plug it. Now retest and see if it holds air. If it does your headgasket is leaking.
Seems pretty clear not interested in mass producing the parts. Gotta admit that gas cap it pretty awesome though. Maybe pass the design off to someone who already makes billet gas caps.
If your not in a hurry I've got a set in great condition and may have a second set this weekend. 100 shipped for this set and let me see what the shape is on the second. I don't have them yet.