S3 Air and idle screw adjuster kit for Keihin carburetors.

Easily adjust your idle and air mixture, without using tools. Anodized billet adjustment knob; CNC precision machined to ensure consistent results and a reliable setting.

This fits: 28 – 36 – 38 – 39 – 41mm. Keihin PWK, PWM and PJ carburetors.

Complete as pictured (carburetor not included).