Pulled my track out of the National Museum of the US Air Force after my 18 month loan. When I fired her up there was a obvious miss and I'm pretty sure I have a stuck valve. Other than pulling my head (Not possible right now as she is going to several shows and then to a warbird museum for display) anyone have any suggestions regards that stuck valve? She started right up after sitting all those months which was excellent and other than the valve issue is running nicely.