Supertrapps...
... If you haven't figured it out yet, I like to "piddle" as much as ride.
I just finished the install of a 4" Supertrapp black muffler (stock # 449-2218) using the Magic Man elbow pipe. I found only one black Supertrapp with a 2.25" inlet that would work... and it's touted as a "universal" and for a car. If you're not familiar
with how this thing muffles, see
http://www.supertrapp.com/technology/index.asp
Summit Racing was the supplier, the price was right ($141 including shipping), and the shipping was very fast. The same muffler is also available in polished stainless if that rings your bell. See
http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUP-449-2218&N=700+115&autoview=sku
Although the pipe inlet is the right size for the Magic Man stainless elbow pipe, I had to fabricate a "hanger" from 1/8" x 1" mild steel. The one I made was about 5.5" long with the two drilled holes on 4.5" centers. You can see it in the pics. I opted not to make a stainless strap hanger as it would scratch the black finish without also incorporating a heat-resistant rubber backing. I also opted not to weld the hanger on "just because".
I first removed the sound dampener tube from the muffler body by removing the two allen-head screws at the rear of the muffler. Because this was not a motorcycle-specific muffler, I had to drill a 3/8" hole through the wall of the exhaust about 11.75" from the rear edge to attach the hanger. That's just in front of the inner perf'd tube with the ceramic packing.
I then inserted a 3/8" x 2" carriage-head bolt from the inside and used stainless washers and a stainess nut on the outside of the muffler body to cinch it up tight. Another stainless nut and washer completes the hanger attachment to the muffler. I used a liberal dose of Loc-Tite on these two nuts... I really don't want the thing to come apart at speed and "torpedo" someone following me.
The Supertrapp uses a series of discs to "tune" the exhaust... more discs means more noise, less back pressure and more horsepower. Fewer discs mean less noise, more back pressure and more torque. I started at six discs (they provide 12), worked my way "up" and "down" from a noise perspective... settled for seven. With seven discs, the sound at full throttle is a little louder than a Hindle but quieter than a Micron. UPDATE: I changed back to five discs... seven was a little loud at WOT.
The provided stock end-cap just yells "cheesy". I bought the optional aluminum Supertrapp end-cap ... I looked for a "Snuff-R-Not" (an adjustable end-cap by White Brothers), but they're no longer made. I also painted the Magic Man elbow pipe with flat black, 1200* high temperature paint.
Performance appears better but will find out this weekend when I compare it to a highly modified Suzuki DL1000 ridden by one member of my small riding group. It can barely beat me in a 1/4 mile (5+/- lengths) with any of the stock, Hindle or Micron.
Now, if you want LOUD, don't put the end-cap or discs on... it is rather extreme due to the muffler's shortness... more like insane, actually.
The entire mod/drill/cut/grind/polish/paint/mount job took about three hours.
Note that I left "stuff" on the garage floor this time just for draboo. :clap: