Keihin carb differences?
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6th Gear
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From: MS
Keihin carb differences?
Parts manual calls for a 1987 FLT to have Keihin (butterfly) carb # 27034-86B. It calls for 1987 FXR and Softail Models to have a Keihin (butterfly) carb # 27029-86B.
What is the difference?
What is the difference?
Last edited by wbeckwith; Jan 1, 2012 at 05:01 PM.
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From: Phoenix '53, '88, '09 Big Twins
+1 on that!
the cv carb is more easily tuned and modded. ( see nightrider.com for info, bike tech section )
CV carb swap will require new cables and a manifold adapter- about $15 for the rubber "mikuni" spigot adapter.
I did same day dyno runs on my 88 fxr, butterfly to CV and picked up a few horses, better overall operation, power at altitude etc.
If you are stuck on a butterfly, pm me and we can do a deal on my old carb
Mike
the cv carb is more easily tuned and modded. ( see nightrider.com for info, bike tech section )
CV carb swap will require new cables and a manifold adapter- about $15 for the rubber "mikuni" spigot adapter.
I did same day dyno runs on my 88 fxr, butterfly to CV and picked up a few horses, better overall operation, power at altitude etc.
If you are stuck on a butterfly, pm me and we can do a deal on my old carb
Mike
Last edited by mkguitar; Jan 1, 2012 at 06:13 PM.
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From: MS
Recently upgraded butterfly w/ Andrews accelerator pump and am satisfied with performance. Bought 3 carb bodies on ebay, one is the 27029, and two CV's with the thought of eventually changing out. Mainly just curious, they appear the same on outside.
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From: Phoenix '53, '88, '09 Big Twins
I think I have a thunderjet kit for the butterfly new in package too. it adds a 3rd midrange jet.
the advantages to the CV are vast. self compensation for altitude has allowed me to dust much more powerful bikes with S&S or mikuni when we go up in elevation
mike
the advantages to the CV are vast. self compensation for altitude has allowed me to dust much more powerful bikes with S&S or mikuni when we go up in elevation
mike
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