so typical bspa have brought in these silencers despite protests from the top riders in the world ignoring the people who know best i.e the riders and we all have to roll over and do as were told by anonmyous non mechanically minded people whos only interest is ways of screwing money out of people.i pity the youngsters the silencers wont be their only expense while theyre struggling to find ways of keeping their engines from melting.