Snapping noise when starting???


Hello all,
I'm getting a snapping noise when starting up. No problems starting and it doesn't do it at all after it's started. Any ideas?

It's an 09 with 4K miles. Almost sounds like an electrical spark but a more pronounced snap only when starting.
Well, I don't know what happened but the noise stopped. I think it may have been where it was sitting for a while without being started or ridden. Maybe some old gas? Anyway, there's a fresh tank of gas and no snapping noise anymore. It's been great weather here in AZ. 83 degrees is perfect for riding. Wish it was like this year-around.