My 97 Vt 600 has that noise two ,I have been told that it is the clutch .
I have also been told that it is one of the crank bearrings rattling in the
case . I did my crank last year and there were marks where the bearrings
sit in the case . My Yamaha dealer sid that they do that with a chisel to
stop that noise . After I did the crank the noise was gone .
I Just overhauled my clutch and the noise is back . I don't know it could be from either .
I put 2000 miles on it last year and it never got any worse so I am not worried about it . I hope some one else has a simple answerfor this .