Jitsie Air Screw Kit PWK 28MM Carburettor

• complete kit including air screw, spring, washer, and o-ring
• OEM-quality components for Keihin PWK 28mm carburettors
• allows precise adjustment of the air-fuel mixture at low throttle openings
• improves idling stability, throttle response, and smoothness
• durable brass construction for long service life
• direct replacement for the original air screw assembly

The Jitsie air screw kit for Keihin PWK 28 mm carburettors allows quick and precise adjustment of the air-fuel mixture at low throttle openings. Manufactured to OEM quality standards, it ensures smooth, stable idling and crisp throttle response.

The air screw controls the amount of air entering the pilot (idle) circuit of the carburettor. Turning the screw out allows more air in, creating a leaner mixture; turning it in reduces airflow, creating a richer mixture. Proper adjustment improves starting, low-speed control, and transition from idle to mid-throttle.

Each kit includes the air screw, spring, washer, and o-ring, ready to install as a direct replacement for the original components.