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Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

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View Poll Results: Does your XL1200 w/EFI surge or hunt
No, it runs as smooth as any other bike 35 23.03%
Yes, at less than 3000 RPM's 81 53.29%
Yes, at all RPM's 9 5.92%
It did but, I.ve added aftermaket items to cure it 27 17.76%
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  #101  
Old 2 Weeks Ago
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Lowe175 Lowe175 is offline
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Several near misses because of this. Welcome to Harley. Accelerating from a dead stop at a light or sign. Jerky and unreliable. I would pull out then nothing while vehicles behind nearly ran me over. Pull in the clutch rev it up and try again. Harley had it for over two weeks trying to figure it out. About three months into the warranty. Remapped it 3 times before they finally got a handle on it. Quick fix. Haven't had a problem with it since but am beginning to think this may be the reason my mileage is so poor 31 mpg city or highway. They wound up putting a high performance map on it then wanted to charge me for it. Good grief.
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  #102  
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Toejam503 Toejam503 is offline
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I'm glad you got it straightened out, let us know how much your mileage improves. Peak mileage = best performance.
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  #103  
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hammer6315 hammer6315 is offline
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Wow! Such an easy fix! Wish I knew about that cure a year ago. Good for you! Wonder if this condition has been reported to our esteemed bureaucracy, the nhtsa.

Last edited by hammer6315; 2 Weeks Ago at 03:03..
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  #104  
Old 2 Weeks Ago
Tomcatt Tomcatt is offline
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Quote:
Originally Posted by hammer6315 View Post
Wow! Such an easy fix! Wish I knew about that cure a year ago. Good for you! Wonder if this condition has been reported the our esteemed bureaucracy, the nhtsa.
It's been noticed. Later Bosch ECU's have more checks built in to detect and defeat Lambda shifters. The aftermarket strives to give us better performance, OE suppliers (under threat from big brother) work at keeping us from doing it.
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