I went into the purchase thinking it was a normal 7. I work at a motorcycle shop and ran the vin and it came back a k1......engine number matches as well. Someone put the seat kit on it at some point. It was a track bike as everything is safety wired. I'm assuming at some point the original tank was damaged or sold so I'm looking to put it back to original.Is bike pictured actually a K. Solo tail with subframe missing? Just curious.