The gasket as described, perfectly fits the selected motorcycle. It could not have been otherwise thanks to the simple and intuitive cataloging of products by model and vintage. The goods arrived one day earlier than the date specified during the purchase.
The outer diameter of the gasket is about 1-2mm too large for the 2010 Honda CBF600, after gently spreading the outer muffle of the muffler went in by force (it is soft) and somehow got there after tightening the cybant, but the installation is troublesome.