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91 xr250l carb accelerator pump blocked off

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Slowly putting together this bike that came to me as many boxes of parts.

 

Pulled the carb apart(91 model I believe) to clean and noticed that the accelerator pump passage ways appear to be blocked of with some sort of brass insert that is not removable. Pump appears complete however.

Did this come from the factory this way?

Anyone see this before or have any comments?

IMG_20140724_174344_203.jpg

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I am rebuilding a '93 xr250l carb and mine looks just like yours. It looks like they blocked off a passageway, maybe Keihin uses the passage on a different carb model? I'm having a difficult time finding a replacement accelerator pump with diaphram. They don't show them included in carb rebuild kits and when I search websites they show the pump on the carb diagrams but have no part number or replacement listed. My local dealer said he couldn't get them either.

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I use to have a very clean xr250l.  I did all the little mods to air, spark, and pumper carb and nothing changed.  There is no beast to be unleashed.  The only thing that helped a lot was dremeling off the ear on the fuel screw to make it kickstart to life with one kick.

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