Hi, Everyone. I'm seeking the wisdom of experience in solving a problem with my SV Gen1 engine. Symptoms: No power, engine struggles to rev starting at about 5k rpm. First detectable issue was that the fuel tank was pressurizing. Performance was "notchy" to start with. As soon as bike was leaned over in a corner, it seemed as if all power was lost and almost sounded like it was running on one cylinder. Sunday morning, bike turned over about 1/2 a revolution and "locked up" so that the starter would not turn it over. I managed to "unlock" it by putting it in gear and manually rotating the rear wheel against the seeming locked up engine. Troubleshooting: First two laps on bike on Sat. morning, engine seemed to perform fine. Would easily rev to 10k. Laps 3+ performance got progressively worse. Got a total of 7 laps in Sat. Although it did not appear to turn over more than a millimeter, eventually the engine "released" and I could crank it over with the starter. Pulled starter and it spins freely. So far this peculiar seizing problem has not returned. Once going, during practice engine performance deteriorated gradually to the point it would only pull about 5k rpm. Removed ball valve from vortex gas cap, which helped for about 2 laps. Added new plugs and checked fuel lines. Checked all electrical connections and cleaned petcock valve. Looking for solutions on where to start troubleshooting next. Thanks in advance for any suggestions you might offer.