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Old June 19th, 2019, 05:13 AM   #1
Oldskool
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Air screw tip broke in carb

Hey everyone I’m stuck at this moment 07 ninja 250 I went to re service the carb and when I went to take out the air mix screw I noticed the tip had broken off in the carb is there anyway to get it out?
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Old June 19th, 2019, 05:57 AM   #2
ducatiman
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yes, working within the venturi...a guitar string (larger diameter than used for pilot jets) lodged into the venturi drilling to press and pop the tip out. There may be carbon clogging the tip so a shot of cleaner may help dislodge.

Its a minute, extremely tight workspace , but as evidenced by my pic, can be done. in my case, long discarded carbs, and carbon around the tip froze it to the drilling, broke upon removing the pilot screw. The fuel deposits eventually solidify and act like epoxy..hence freezing jets and fuel metering surfaces. No secrets there.

So, you a geetar player? If memory serves a B or G string fits. As comes in varying diameters within sets, I can't remember the actual measurement I used.

And for any worry-wart surgical types wondering...the string will not maul the pilot opening...even if any tiny, minute opening did occur, fuel delivery would be compensated for via adjustment within correct, standard pilot setting procedure anyway.

So doanworryboudit. OP if you are truly stuck and so inclined, i'm at your service.
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Old June 19th, 2019, 11:15 AM   #3
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The broken tip can be pressed in from carb venturi side.
There may be anodic corrosion from dissimilar metals touching.
An ammonia-based cleaner can dissolve this corrosion and free up tip.
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Old June 20th, 2019, 06:41 AM   #4
ducatiman
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so @Oldskool.....wha happen? You get it out?
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Old June 20th, 2019, 06:43 AM   #5
Oldskool
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No haven’t had any luck on getting it out sorry for some reason my email didn’t send you reply’s
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