found it,dont know how to do a linky as iam an old foccer :rolleyes ...look at "exhaust downpipes yes or no " in the "fazer thou corner" page 7 , 24 feb 2014.......i think iam right in saying the 600 uses a 6mm stud while the thou has 8 mm but this method will work on both 
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y
One, is never going to be enough.....