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Old 03-16-2013, 02:18 PM   #12
Yam2Yam2 OP
Adventurer
 
Joined: Jul 2012
Oddometer: 22
Well, I couldn't wait, I went for a short ride. I decided that the packing was too quiet, so I clipped off 4" length from the header pipe end, and I took out 6" width from the interior. This makes the idle louder, and low-speed riding isn't whisper-quiet, but still suitable for neighborhood riding. I'm really loving the increased torque just above idle with the megabomb header.

Unfortunately, even with the additional removal, top speed stuck at 79 mph in my quick test. At speed, the muffler is much quieter, and very smooth. So even more material could be removed. At this point, I think I'll try using a square piece of hardware cloth, rather than triangular, to give two to three wraps extending the length of the muffler, with an open space inside for uninterrupted flow.
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