it happened to me as well, I just got a metal disk, put a 20mm hole in it and bolted it back on.
Why thank you Gremlin, you are the best frenemy. Working out how to get around this site...
Valkyrie, questions of this nature are best asked in the Mechanics area of the general forums, rather than in blogs. For exhaust questions, this would be the best place: http://www.kiwibiker.co.nz/forums/fo...exhaust-system
Yes happened to me. I just left it off - who cares? No biggy.