When starting the bike cold, if it doesn't start completely on the first or second attempt, I hear a tremendous metal to metal KlanK noise as the engine comes to a stop. WTF is that? For instance let's say it's 55 degrees outside and I don't give it enough choke, if the start doesn't get the engine running I hear this as the engine comes to a stop. Anyone else experience this? It runs perfectly after starting. Prolly nothing to be alarmed about but I've never heard a bike do this before. This is a new '06 with 300 miles.