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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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Old 18th March 2017
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Sportster/Buell Model: Custom Sputhe XR
Sportster/Buell Year: 19**
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1965
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Default Keihin Andrews accelerator pump high flow cover

It looks to me Keihin made all these covers so any of the basic raw castings can have additional operations incorporated to be used in any of their many configurations.
The stock pump cover for non CV Harley carbs (2-2) (on right) uses the same passage for supply and pump shot.
The high flow cover uses seperate passage for supply and pump shot (4-2). It also contains a loose check ball in passage.
The stock cover is not easily owner modified to incorporate seperate passages and check ball (2-2).
The Keihin CV pump cover (4-1) (left in center photo) is a high flow cover just as the Andrews. The only difference is the (4-1) cover has an extra counterbore compared with stock non CV.
The CV cover is made with packing bore in cover.
The non CV is made with packing bore in bowl body.
Seems to me the CV (4-1) cover can be made to work in non CV if (2) square packing are used, one in cover and one in carb body.
Note: All orifices in covers are the same.





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