Just got a reply from Stark Future. Turns out engine number not being visible is only a part of the issue. There’s no unique engine number at all on Vargs.
“SMX1-PT-CS-01” from the screenshot above is a part number which is the same for every bike. Stark Future claims that someone succeeded by using the part number and is suggesting me trying the same.
Based on my experience this will not fly with the DMV inspector I talked to…