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Chopped OE Exhaust

Old 06-14-2011, 08:15 PM
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Join Date: Apr 2011
Location: Chicago, IL
Posts: 57
Default Chopped OE Exhaust

Okay so I am contemplating chopping my exhaust AFTER the resonator just so it exits right past my foot on my '06 F4i...any downsides besides it being loud? I cannot STAND the gargantuan stock exhaust on the bike and I want to try something out before buying (possibly) an aftermarket pipe.
Old 06-14-2011, 08:57 PM
City Bike Racing's Avatar
June 2012 Ride of the Month
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I wouldn't waste your time, it'll most likely still look like a pile o sh*t hanging off the back of your bike.
Old 06-15-2011, 10:04 AM
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Location: Chicago, IL
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I am simply asking whether it would cause damage by running an 'open' pipe after the resonator. Approximately 10" after the connection to the header, I'd chop it off (no muffler used). LMK!
Old 06-15-2011, 10:26 AM
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Join Date: May 2010
Location: Btown INDY
Posts: 67

you would need a PCIII to run that though.

I am planning on doing that soon, but there's problems with back pressure and everything like that, so i'm not sure how to tune it yet, but i am looking into that.
Old 06-15-2011, 02:45 PM
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Join Date: Jun 2011
Location: Palm Springs, CA
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How far down can you chop the can without having to tune it? sorry for the hijack i was about to do a post of my own. lol
Old 06-17-2011, 02:40 AM
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Posts: 139

you dont HAVE to run a power commander or tune it, i have a track f4i and when i was just getting into racing it i didnt have a power commander but was running open pipe just a downturn off the headers, it ran fine, better than fine it was great up high, lost a bit of kick down low revs but if your having that problem your in the wrong gear! lol
its unbearably loud though, i really dont recomend it on the street, its still one of the loudest at the track. its not always a good thing bringing alot of attention to yourself lol, here are pics of my race and my street exhaust if your looking for a clean look you can try making one of these with an aftermarket can

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Last edited by ozf4i; 06-17-2011 at 02:46 AM.
Old 06-18-2011, 11:42 AM
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Join Date: Apr 2011
Location: Chicago, IL
Posts: 57

The last picture is something close to what I'm talking about and instead of turning down, turned up a little past the rearset.
Old 06-18-2011, 12:22 PM
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Location: Mesa AZ
Posts: 2,000

There is no resonator. Theres a header, a mid pipe [with cat convertor on 01-05 cali and all 06 models otherwise its just a pipe] and the muffler. You want to chop the muffler and run a strait pipe? Besides being ugly and louder then hell it won't cause any problems. Lots of kids do it.

OZf4i- your track bike runs so great at high rpm with a commander most likely because its running lean. Leaner mixtures make more power until the pistons fail.
Old 06-18-2011, 06:38 PM
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Posts: 139

Like i said i ran it without a power commander at the
Beginning, now it's fully tuned has a great power curve
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