Hi Guys and Girls,

I'm a newly proud owner of a 2004 XT660X, bought 3 days ago. I've never owned a single before and so far I'm grinning every time I ride, however the bike has a strange little habit of 'popping' when coming off the throttle. At first I put it down to being a single but now its getting worse and constantly popping when on closed throttle (slowing down) and between gear changes. Is this normal or have I bought a dud?!?!