Dellorto idle adjusting screw, VHB T/Z, PHF, PHBH, knurled for slide stopThis is the screw on the side of your VHB, VHBZ or PHF carburetor that you turn with your fingers to adjust the height of the slide, which controls the idle speed.
Click to enlarge
Dellorto idle adjusting screw, VHB-PHF, knurled for slide stop :: $2.85
(click to view details)
This same part number may also be presented in these alternate formats: