The TSB instructions I saw, IIRC, said that the dealer has to tear it down and photograph the piston and cylinder wall to verify if scored and send photos to Yamaha. If scored, which is assessed as lack of filter maintenance, then they will not fix and the customer has to pay to complete. Or as my dealer said, pay them for work to that point to take it home. And my dealer said I could not bring it to them with the carrier and body panels off to save them the time and me money. So I fixed it myself.