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techtalk:evo:carb01 [2019/10/18 00:27] hippysmack [Sub Documents] |
techtalk:evo:carb01 [2020/05/10 17:51] hippysmack [Keihin Butterfly (non-CV) Carburetor (Stock on 1976L-1987)] |
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[[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
====== EVO: Carburetor, Intake Manifold & Exhaust ====== | ====== EVO: Carburetor, Intake Manifold & Exhaust ====== | ||
- | ===== Sub Documents ===== | ||
- | |||
- | * [[techtalk:evo:carb01a|Rebuilding the Keihin CV Carb]] | ||
- | * [[:techtalk:evo:carb02|Keihin CV40 Carb Functions, Adjustments, Tuning]] | ||
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- | \\ | ||
====== Overview ====== | ====== Overview ====== | ||
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\\ | \\ | ||
- | ====== Keihin Butterfly (non-CV) Carburetor (Stock on 1976L-1987) ====== | + | ====== Keihin Butterfly (non-CV) Carburetor (Stock on L1976-1987 Sportsters) ====== |
* The Keihin non-CV carburetor is a horizontal type with a fuel bowl, single ring-shaped float, an accelerating pump, idle mixture adjusting needle and a throttle stop screw for speed adjustment. ((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM)) | * The Keihin non-CV carburetor is a horizontal type with a fuel bowl, single ring-shaped float, an accelerating pump, idle mixture adjusting needle and a throttle stop screw for speed adjustment. ((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM)) | ||
* The throttle body casting contains an integral venturi and a fuel valve seat that is pressed into the body. The underside of the throttle body contains a boss. The main jet screws into the boss and holds the bleed tube in place.((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM)) | * The throttle body casting contains an integral venturi and a fuel valve seat that is pressed into the body. The underside of the throttle body contains a boss. The main jet screws into the boss and holds the bleed tube in place.((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM)) | ||
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====== Keihin CV 40mm Carb (1988-2006) ====== | ====== Keihin CV 40mm Carb (1988-2006) ====== | ||
+ | \\ | ||
+ | ===== Sub Documents ===== | ||
+ | |||
+ | * [[techtalk:evo:carb01b|Keihin CV Carb Identification]] | ||
+ | * [[techtalk:evo:carb01a|Rebuilding the Keihin CV Carb]] | ||
+ | * [[:techtalk:evo:carb02|Keihin CV40 Carb Functions, Adjustments, Tuning]] | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | |||
+ | |||
+ | |||
* Constant velocity, gravity fed - has a float-operated inlet valve and a vacuum-operated variable venturi (movable slide). | * Constant velocity, gravity fed - has a float-operated inlet valve and a vacuum-operated variable venturi (movable slide). | ||
* Both the CV40 and CVK carbs are made by Keihin in Japan. But only the CV is specific to a Harley and has the bar and shield and HD name on the side. ((CVPerformance of the XLFORUM http://xlforum.net/forums/showthread.php?t=1729649&page=2)) \\ CVK is for Kawasaki and various other makes that contracted Keihin for that carburetor. \\ There is also a CV40 making the rounds that is distributed by a Florida company that looks identical but not all the specs match up. \\ There is no guarantee that any part (original or CVP) will fit those knock-off carburetors. \\ If your CV carb does not have the name Harley Davidson cast above the bowl on each side it is a knock-off. | * Both the CV40 and CVK carbs are made by Keihin in Japan. But only the CV is specific to a Harley and has the bar and shield and HD name on the side. ((CVPerformance of the XLFORUM http://xlforum.net/forums/showthread.php?t=1729649&page=2)) \\ CVK is for Kawasaki and various other makes that contracted Keihin for that carburetor. \\ There is also a CV40 making the rounds that is distributed by a Florida company that looks identical but not all the specs match up. \\ There is no guarantee that any part (original or CVP) will fit those knock-off carburetors. \\ If your CV carb does not have the name Harley Davidson cast above the bowl on each side it is a knock-off. | ||
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- | **Serial Number:** | ||
- | * Labeled on the adjacent side to the accelerator pump linkage | ||
- | |||
- | Example 27231-98 translates to | ||
- | |Keihin CV Serial Number|Year of Introduction|Notes| | ||
- | | 27231 | 1998 | Can be used on same year and / or future multiple models| | ||
- | |||
- | \\ | ||
===== Factory Keihin CV40 Carburetors by Sportster Model/Year ===== | ===== Factory Keihin CV40 Carburetors by Sportster Model/Year ===== | ||
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If the plastic nut has stripped out, you can cut a piece of rubber tubing, slit it long ways and stick it between the nut and the knob when needed. ((cantolina of the XLFORUM http://xlforum.net/forums/showthread.php?t=447983)) \\ | If the plastic nut has stripped out, you can cut a piece of rubber tubing, slit it long ways and stick it between the nut and the knob when needed. ((cantolina of the XLFORUM http://xlforum.net/forums/showthread.php?t=447983)) \\ | ||
- | Then when you remove it, slip it on my throttle cable until the next cold startup. \\ | + | Then when you remove it, slip it on the throttle cable until the next cold startup. \\ |
====== Discrepancies in the FSM(s) / Parts Catalog(s) ====== | ====== Discrepancies in the FSM(s) / Parts Catalog(s) ====== | ||
Upon perusing 1986-2006 Parts Catalogs for carburetor information, it's clear that the MoCo was trying to save space in these books at the expense of legibility. Below is a chart showing the initial intentions on the top and the MoCo's mis-interpretations on the bottom. They give no notations (from year to year book) on any changes to the nomenclature. I.E. one way to display a year/ model number is displayed differently in other year books. This chart is not complete nor factual in numbering but as an example only. | Upon perusing 1986-2006 Parts Catalogs for carburetor information, it's clear that the MoCo was trying to save space in these books at the expense of legibility. Below is a chart showing the initial intentions on the top and the MoCo's mis-interpretations on the bottom. They give no notations (from year to year book) on any changes to the nomenclature. I.E. one way to display a year/ model number is displayed differently in other year books. This chart is not complete nor factual in numbering but as an example only. |