Keihin Air Adjust Screw — W1446-231-9900

Keihin air adjust screw, part number W1446-231-9900, 018-089 for PWK28, standard PWK33, PWK35, PWK38 and PWK39, PWK35 and PWK38 Quad Vent / Air Striker, PWK36 Quad Vent, PWK41, PWK39 snowmobile, PJ34, PJ36, PJ38 and PWM38 carburetors. Standard PWK36 is not included.

The screw meters air in the pilot circuit for idle-mixture adjustment. On a PWK-style carburetor, turning it out generally leans the mixture and turning it in richens it. Supplied as the screw only; the spring is separate.

• PWK33 diagram reference: 17
• Diagram reference: Standard PWK38 — 17
• Diagram reference — PWK28: 17
• Diagram reference — Standard PWK35: 17
• Diagram reference — PWK39 Standard: 17
• Diagram reference — PWK35/PWK36/PWK38 Quad Vent / Air Striker: 17
• Diagram reference — historical PWK41: 17
• Diagram reference — PJ34/PJ36/PJ38: 17
• Diagram reference — PWM38: 17
• Diagram reference — PWK39 Snowmobile: 30