Compliance fitting
Road Warrior
Joined: Jun 2009
Posts: 1,687
Likes: 9
From: SoCal & West TN
The compliance fitting was replaced by an aluminum intake that was rubber mounted to the heads. This allowed a bit of give and take as the head heated up and cooled off. I replaced mine and never had another leak. Are those fittings even available anymore? Should be obsolete....that's one part we can do without.
I never used them because I replaced the manifold with an S&S Solid Manifold.
Seasoned HDF Member
Joined: May 2008
Posts: 21,143
Likes: 12,707
From: South Carolina
The compliance fittings and the butterfly Keihin carbs made their last appearance on the `89 model year bikes.
The truth is, my bike runs a LOT better now. I also saw some comments that it's best to throw those away and replace them with something else. Why, and what is the best way to go for replacements?
To upgrade to a later model carb configuration, you would need to find :
CV carb (made for a Harley)
Intake manifold, Backing plate, Air filter and Air filter cover (`90 or later carb model bike).
These parts are easily found on the well known online auction site.
There are also aftermarket carburetors, the S&S E model, and the Mikuni HSR 42, however, they would cost much more than buying used parts to upgrade to the CV carb.
Last edited by Dan89FLSTC; Aug 31, 2012 at 05:00 PM.
Seasoned HDF Member
Joined: Dec 2004
Posts: 11,068
Likes: 1,473
From: Texas! Ya mean there's someplace else?
Means that no matter what throttle position is the air flow velocity through the carb is constant. Makes it easier to more precisely mix fuel by taking out a variable, and allows the carb to efficiently operate over a much wider range of altitudes. The butterfly-type carb's air flow velocity changes with throttle position.
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Cruiser
Joined: Aug 2012
Posts: 106
Likes: 0
Means that no matter what throttle position is the air flow velocity through the carb is constant. Makes it easier to more precisely mix fuel by taking out a variable, and allows the carb to efficiently operate over a much wider range of altitudes. The butterfly-type carb's air flow velocity changes with throttle position.
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Road Master
Joined: Jun 2007
Posts: 842
Likes: 47
From: New Hartford CT
As I mentioned above, that was the first mod I made to my '89 when I first got it. I got a used CV, along with a new manifold/air filter kit and it made all the difference in the world. I have since swapped out that old CV for a Wood-built CV, but that old used carb with a little TLC served me well for five years.
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,199
Likes: 3,087
From: NW AR
Yeah, the compliance fittings were A Bad Idea. I would have to replace them about once a year, two on the outside. I now have the S&S solid manifold and have not had an intake leak since. Knock on wood.