Hello everyone! My first post. So I'm looking at buying this 05 500. Very nice machine except for the engine knock! It's very loud! To me it seems to be more behind the pull start, recoil. Reminds me of a desiel sound. I've just looked at the machine nothing else. Also it wont idle. He did have it at a service station, but didnt want to pay for them to look further into it. So it's a 2005 500 2,200 miles. Looks like new! Great for its age. Was asking 1500 now down to 1000. I've done some searches but just not sure.