Help with carb re-install on '07 Summit X 159 (have pic ! )

Dec 10, 2013
Hi I took the carbs off to inspect. They were sparkling clean. Good. but sometimes it quits when idling.

Putting it back together there's a nipple with no hose in the vicinity.
Can someone tell me the name of the componrent?
And also if this nipple has a hose, or is just line the pic, (no hose)

If there's a hose, where does it come from?


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