20

Muffler Shortening

By
q20v
1340

The slip-on muffler is an Akrapovic 1000cc beast that almost measures 20" in length. Sean planted the idea to shorten it to a more suitable length for a 600cc bike and in the end it wasn't actually that much work.

This chapter goes with the Muffler Bracket chapter because the old bracket would not work with the shorter muffler.

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First step was to drill out the rivets and start separating the end cap from the can.

I cut through most of the can with the angle grinder, and finished the cut of the titanium sheet with a hack saw to minimize the damage to the muffler packing.

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After cutting through the can, I cut the packing and perforated stainless sheet with sheet metal cutters. I didn't completely separate the end piece from the can until all cutting was complete. I did this because I was afraid the packing/perforated tube might collapse during cutting, preventing the inner tube from re-inserting.

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Pull the inner tube out now, mark the length to shorten (same as the can sheet metal), and cut. Reassemble the muffler. Using the old end piece strap, mark off the rivet holes, drill, and rivet.

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Please continue to the Muffler Bracket chapter.

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I've only been able to idle the bike and blip the throttle since the shortening. Sounds similar, maybe a tad louder? I'm anxious to open it up on the track, though. - q20v July 4th 2017
how does it sound now? - ripcurl July 1st 2017

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