Il use an American phrase "That sounds like Shit" either your shims need doing & or the tensioner needs adjusting. First i would adjust the tensioner they often need a little help, with the engine off & in a quite area carefully back out one of the retaining bolts on the tensioner 3 or 4 turns then slowly start backing out the other one until you here a faint click, that's the spring in the tensioner pushing the rod out one more notch. Now tighten both bolts back up so the tensioner is back in place, start the bike if there is an improvement with the noise repeat it again but only once more the noise should be just about gone. If it hasn't then you've got to get the valve gaps checked.
192MPH stock engined 2008