marshall13 wrote on 05/10/09 at 10:40:36:Jim, i gotta tell you, that is about as impressive a piece of shadetree blacksmith work as ive ever seen... a "county mountie" valve.... street racers used to do about the same, only the butterfly would choose either a path to mufflers, or an open leg of a y-pipe... whisper quiet for the challenge, open and uncivilized for the run.... might stll be able to find them on jc whitney...
Thanks. I use it around town in stoplight traffic where I often get a cop behind me waiting on a red light. My bike isn't obnoxiously loud and pretty much blends in with most harleys around here. But the sound can ricocchet off of the downtown buildings and make it sound louder than it really is.
I made a different baffle that is only 5" long that sits just in front of the butterfly. If open drag pipe on a volume scale is a 10 and stock muffler is a 1, my pipe with the butterfly open is probably a 7-8 and with the butterfly closed maybe a 3.
I mounted the cable here:
And this is the cable pulled and the butterfly in the closed position: