Quote from: Paul Danik on March 11, 2025, 09:28:26 PMHi Rob. I don't think by vin # you can ID it as an ISDT machine, as to the best of my knowledge no such records exist. See if it has dual coils or at least dual coil mounts. How about a center stand. The build date could rule it out as an ISDT machine as the ones I have known to be ISDT machines were built just before the event, maybe a month or 2 before. Hope this helps. PaulMy '73 250 HS has dual coil support and was built 2 months before the ISDT.