Asking triumph about VIN numbers with update kits will only be partially useful. A lot of us did them ourselves or had an independent do it. Labor charges will run 1600-2400 depending on the rate. Triumph quotes 20 hrs and that's pretty accurate. The parts kit used to be a steal at $200 but it's gone up to $1000 as well. That's the reason we mentioned 09 or newer. Major parts are transmission, output bearing, wiring harness and cam tensioner guides. Most that have had issues have been limited to not all parts and many haven't had issues at all. But it can be a costly repair on a used bike; therefore the warning

If you can verify with the previous owner then earlier models are back in play!