Has anyone on here had the problem of cam chain rattle when the tensioner fails. Prob not easy to explain but what does it sound like? I've had a major problem with my bike having an oil leak for which its been back to the dealers 4 times. Out today for first ride since getting it back and it develops this pretty horrible sounding mechanical rattle noise. So after an expensive trip on a transporter its back at the dealers again. They weren't committing themselves but suggested it may be cam chain tensioner. Bikes only a year old having done just over 2000 miles.