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22nd July 2009
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Biker
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Join Date: Jul 2009
Posts: 11 Sportster/Buell Model: XL883C Sportster/Buell Year: 2006
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intake/jets/exhaust upgrade - effect on gas milage?
I've got a bone stock '06 883C with a Kuryakyn Pro-R Hypercharger and hi-flow K&N on the way 
I'd like to jet the carb, and add a SuperTrapp 2-1 exhaust system to improve performance a bit. 
My question is, what is the tradeoff? Will my milage suffer? How much? Any other downsides that the upgrades will create?
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22nd July 2009
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Known Troublemaker !
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Join Date: Jul 2006
Location: Lexington, NC
Posts: 7,347 Sportster/Buell Model: Sportster 1200C Sportster/Buell Year: 06
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IMO:
You should suffer very little in MPG, Because if the engine is properly tuned it will become more effiecent.
The reality though is you may loose a small amount of MPG's Simply because with it running this much better you will likely Not drive easy...!
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22nd July 2009
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XL Forum Gold Supporting Vendor
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Join Date: May 2005
Location: Longmont, Colorado
Posts: 10,193 Sportster/Buell Model: 07 883 X2 plus 5 Buells Sportster/Buell Year: 2007 Sportster/Buell Model #2: 92 Sportster/Buell Year #2: 96 Other Motorcycle Model: and 2 more!!
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What Matt said.
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Dan
NRHS
303-702-1600
www.nrhsperformance.com
The truth is out there. It's only a matter of time!
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22nd July 2009
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Senior Master Custom Bike Builder
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Join Date: Apr 2008
Location: Suffolk, UK
Posts: 3,557 Sportster/Buell Model: XL1200R Sportster/Buell Year: 2005
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Not disagreeing with the other guys but it depends where your tuning is coming from and where you are going to. If you start with a stock bike running lean with an AFR of around 14.5-15.5 and add cams, ignition, A/C, pipes, etc and tune the carb then you will definately see the difference in MPG. You can go from 150 miles to reserve on a 4.5G tank to about 110 miles.
__________________
Fox
I had an '05 1200R.
Last edited by FoxsterUK; 22nd July 2009 at 18:36..
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22nd July 2009
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XL Forum Gold Supporting Vendor
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Join Date: May 2005
Location: Longmont, Colorado
Posts: 10,193 Sportster/Buell Model: 07 883 X2 plus 5 Buells Sportster/Buell Year: 2007 Sportster/Buell Model #2: 92 Sportster/Buell Year #2: 96 Other Motorcycle Model: and 2 more!!
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You are correct. It all depends of the tune of the AFR.
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22nd July 2009
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Biker
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Join Date: Jul 2009
Posts: 11 Sportster/Buell Model: XL883C Sportster/Buell Year: 2006
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AFR = air/fuel ratio right??? (sorry, I'm a total rookie)
Do I need to find a Harley mechanic to adjust that? I live in northern Japan, and I don't know of an authorized factory mechanic anywhere north of Tokyo.  |
22nd July 2009
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XL FORUM LIFE MEMBER
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Join Date: Feb 2007
Location: Pittsburgh, PA
Posts: 13,143 Sportster/Buell Model: XL50 0596 Black Sportster/Buell Year: 2007 Other Motorcycle Model: E-Glide Other Motorcycle Year: 2003
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Quote:
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AFR = air/fuel ratio right?
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Yep.
Quote:
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Do I need to find a Harley mechanic to adjust that?
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There are a lot of options for DIY tuning. There are also a few self tuning devices (black boxes) available.
__________________
Bob, a glutton and a winebibber, a friend of bartenders and sinners!
Sportys tend to keep getting faster the longer you own them.
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