i had a 300ex with a graydon on it,i know its completely irrelevant to the zukis but when the bracket broke off the silencer we tried to get ahold of the company and they said they went out of business but there was a few left in a wearhouse they would sell me?im kinda fuzzy on the exact details due to this being close to 10 years ago.but from what i remember their company just did 4 poke pipes. it was a loud healthy sounding pipe for a girl bike,everyone ALWAYS knew where i was lol,just had to listen.