Gen 2: 2006-2007 Stock Pipes Shortened - Kawasaki
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post #1 of 3 Old 01-02-2018, 06:47 PM Thread Starter
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Stock Pipes Shortened

Hello! I recently purchased a 2007 zx10r - all stock, no mods, with the exception of the mufflers. It appears that the previous owner somehow "shortened" the stock mufflers. It looks like they did a pretty clean job - must've removed the end caps, cut off about 4-5 inches, then re-installed the caps. The bike runs and sounds fine, but I'm wondering if anyone has ever heard of this being done - doesn't seem like a very common thing? Can this have a negative effect on the engine's life or performance? This is my first sportbike, so I have nothing to compare it to. Thanks!
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post #2 of 3 Old 01-02-2018, 07:45 PM
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It's very common. People call them "shorty" mufflers and I've frequently seen it done to older style Akrapovics and Yoshimuras. It may be a coincidence, but both of these are known for being relatively quiet aftermarket mufflers.

I'm not sure what it does for power outputs but I did mine just for the aesthetic value.

You're also correct with your analysis. Doing it properly involves drilling out the rivets of an end cap, cutting the entire muffler on a band saw or with a hacksaw and reassembling with or without new fibreglass packing.

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Last edited by Porschenut; 01-02-2018 at 07:49 PM.
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post #3 of 3 Old 01-02-2018, 10:07 PM
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Won't effect anything... will change sound some. Not really any performance gains at all. Get a real exhaust.
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