I have put on about 80 miles since I've gotten this sled and it had 330 on when I bought it. There is a slight miss at low end and a backfire once in a while when you crack it. Didn't call the dealer as We finally have a winter going in Minn and they are swamped. Any one ever have this happen? Just got rid of a SRX and when it did that one plug was fouled. Same with a Fourstroke? Its a 2007. Thanks MS-6