 exhaust restrictor ring
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Joined: Oct 2010
Posts: 40
Greenhorn
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OP
Greenhorn
Joined: Oct 2010
Posts: 40 |
Hi Can anyone tell me if removing the front exhaust restrictor ring (that looks like a washer welded in) will make any difference to sound or performance on my long slash cut tors for a 2009 efi America. Thanks for any help 
Old Git,Young Bike--Both a bit wobbly !!
2009 America,Old English White/Pacific Blue
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Re: exhaust restrictor ring
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Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
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Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Are you referring to the header itself or something in the slip-on pipe?
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Re: exhaust restrictor ring
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Joined: Oct 2010
Posts: 40
Greenhorn
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OP
Greenhorn
Joined: Oct 2010
Posts: 40 |
in the slip on pipe about 4" in from where it clamps on the header pipe
Old Git,Young Bike--Both a bit wobbly !!
2009 America,Old English White/Pacific Blue
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Re: exhaust restrictor ring
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Joined: Jan 2005
Posts: 5,268 Likes: 16
Saddle Sore
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Saddle Sore
Joined: Jan 2005
Posts: 5,268 Likes: 16 |
Quote:
in the slip on pipe about 4" in from where it clamps on the header pipe
It will give the pipe a bit more free flow but it doesn't change the sound all that much.But,yes I would remove them
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Re: exhaust restrictor ring
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Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
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Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Unless you are also going to have the bike remapped I wouldn't remove it. Also, insufficient backpressure can adversly impact midrange, & although EFI can be remapped to compensate, that situation can make carb tuning difficult.
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Re: exhaust restrictor ring
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Joined: Mar 2005
Posts: 2,419
Oil Expert
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Oil Expert
Joined: Mar 2005
Posts: 2,419 |
Quote:
Unless you are also going to have the bike remapped I wouldn't remove it. Also, insufficient backpressure can adversly impact midrange, & although EFI can be remapped to compensate, that situation can make carb tuning difficult.
+1 That restrictor is there to create back pressure at a tuned length (in a specific rev range). Remapping probably won't compensate for the lost power from removing the restrictor.
If you want more sound start cutting baffles from the tail end of the muffler. Or better yet get some aftermarket pipes that are proven to have great sound.
Cheers, Richard
~~~~~~~~~~~~
09 America, Staintune Pipes, K&N, Breathe, Hagon Nitros, AI & O2 removed, tune 20184 (modified), MTX-L a/f gauge
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Re: exhaust restrictor ring
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Joined: Aug 2010
Posts: 1,738
Learned Hand
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Learned Hand
Joined: Aug 2010
Posts: 1,738 |
Well said Richard. Remove the baffles for louder better irritating and incredibley enjoyable sound. Dont play with your ring.
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Re: exhaust restrictor ring
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Joined: Sep 2010
Posts: 8,393 Likes: 1
Second Wind
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Second Wind
Joined: Sep 2010
Posts: 8,393 Likes: 1 |
I run straight pipes but, I am running one huge carb.
I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago.
Edgar Allan Poe
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Re: exhaust restrictor ring
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Joined: Feb 2007
Posts: 23,225 Likes: 62
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,225 Likes: 62 |
Huge carb still won't compensate for loss of back pressure.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: exhaust restrictor ring
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Joined: Sep 2008
Posts: 242
Adjunct
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Adjunct
Joined: Sep 2008
Posts: 242 |
Do the other aftermarket pipes have reducer rings?
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Re: exhaust restrictor ring
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Joined: Feb 2007
Posts: 23,225 Likes: 62
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,225 Likes: 62 |
I would have answered but have not been inside them but since no one else has I will anyway at least to aknowlege your post and question. I know the Sceptres have something in them but not exactly sure what. I would imagine the others do but not sure.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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