ORIGINAL: torqmeister
One change to your Brison 3.2 figures.. My Bisson standard down tube muffler weighs 4 oz, giving me a total wieght of 62oz. Thanks.
As you noted your noise maker is a Bisson verses that which was supplied by Brison for my engine.
FWIW: The Brison I owned along with the down tube noise deflector was around four years ago now.