Hi, I'm new here. I just pulled my sportsman 550 into the garage to start troubleshooting. It was a little slow to start the other day, then the next time I tried, it just turns over. Doesn't even sputter. I bought the quad new in 2011, and it doesn't have a ton of use. I will start with the basics, but I thought maybe someone on this site might have some useful input. I have a feeling it has something to do with fuel injection, but I don't have any reason to think that yet. I am ok at mechanics, but haven't worked on much when it comes to f.i. anyway, thought I'd introduce myself.