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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #21  
Old 1 Week Ago
SLW210's Avatar
SLW210 SLW210 is offline
Chief Harley Engineer
 
Join Date: Jun 2017
Location: Near Ft. Myers
Posts: 528
Sportster/Buell Model: 1200C
Sportster/Buell Year: 2009
Sportster/Buell Model #2: FXLR Low Rider
Sportster/Buell Year #2: 2019
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Quote:
Originally Posted by Pagey View Post
Finished three auto tunes and got pretty good coverage. The bike is running very nice, although I need to iron out some decel popping. I’ve checked for intake and exhaust leaks.

Any thoughts?
Yes, I have some thoughts. What tuner are you using? Exhaust? Intake?

Quote:
Originally Posted by sportsterpaul View Post
To stop decel popping just keep accelerating!
That's the best way!
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  #22  
Old 1 Week Ago
SLW210's Avatar
SLW210 SLW210 is offline
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Join Date: Jun 2017
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Sportster/Buell Model: 1200C
Sportster/Buell Year: 2009
Sportster/Buell Model #2: FXLR Low Rider
Sportster/Buell Year #2: 2019
Reputation: 923502
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P.S.
Where did you get your base tune?
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  #23  
Old 1 Week Ago
Pagey Pagey is offline
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Sportster/Buell Model: Iron883
Sportster/Buell Year: 2016
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I’m running a Cobra 909 Speedster exhaust weight baffles, and using a FP3 tuner.
Aaron at Hammer provided me the base tune for my setup. He suggested increasing the numbers in the decel columns of the VE tables. Not sure how much to increase them by or wondering if I should use the FP3 decel setting and add one “firecracker”
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  #24  
Old 1 Week Ago
SLW210's Avatar
SLW210 SLW210 is offline
Chief Harley Engineer
 
Join Date: Jun 2017
Location: Near Ft. Myers
Posts: 528
Sportster/Buell Model: 1200C
Sportster/Buell Year: 2009
Sportster/Buell Model #2: FXLR Low Rider
Sportster/Buell Year #2: 2019
Reputation: 923502
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I have seen the guys at V&H on other forums help out others using the FP3 remove decal pop.

Try contacting V&H.
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  #25  
Old 4 Days Ago
Pagey Pagey is offline
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Ran another set of auto tunes and getting a lot better.

Interesting thou the second AT lowered a bunch of the front cylinder VE values and nicer ease the rear
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