but look at the pictures, there's plenty of dust calamine which in the first chamber of the exhaust, this part is not accessible but very important to absorb the noise (bigger than the second accessible chamber ).
so it needs to be repacking to, but it is not possible for beta to offer this possibility because of the cost of this function on the exhaust ...
For me i see a great advantage because for improvment of less noise on a used bike of december 2009 !