Genuine Throttle Air / Idle Bypass Setting Screw for Yamaha FZ, FZ16 & FZS Fi Series (SKU: TASYFZF1)

Precision CNC Threads: Cut to micro-tolerances to allow highly granular, 1/4-turn adjustments without slipping under engine vibration.

Corrosion-Resistant Base: Forged from high-grade brass/alloy material to prevent seize-up or deformation inside the aluminum intake bodies.

Complete Sealing Profile: Eliminates dynamic vacuum leaks by creating an airtight seal against the inner throttle bypass chamber.

Dual Platform Calibration: Engineered to handle the unique micro-airflow demands of both classic CV carburetors and modern Fi throttle bodies.

Direct Factory Spec: Arrives molded exactly to original geometry lengths, matching the internal taper parameters of your factory manifold channel.

Factory Part No Reference: 2GSE410400 Equivalent

Is your machine engine stalling at traffic lights, idling roughly, or dropping RPMs unexpectedly? Carbon buildup, thread stripping, or a worn O-ring on your factory adjustment screw is likely cutting off vital low-end air passage.

The Throttle Air Screw Assembly for Yamaha FZ, FZ16, and FZS Fi series (SKU: TASYFZF1) is a factory-precise, drop-in replacement part meticulously crafted to restore absolute air-fuel stability. Designed to work smoothly across both legacy carbureted Mikuni architectures and modern fuel-injected (Fi) throttle body bypass paths, this calibrated component regulates the sensitive air volume entering your cylinder engine during closed-throttle states. Swapping your old screw with this original spec unit instantly stabilizes cold starts, cleans up throttle response, and preserves your target fuel efficiency.

❌ Generation Fitment Warning: This Throttle Air Screw is built specifically for FI models Yamaha FZ16 / FZ / FZS (Gen 1), Yamaha FZS Fi / FZ Fi (Version 2.0), Yamaha FZS Fi / FZ Fi (Version 3.0 & V4) using the Throttle body setup. It will not fit newer Yamaha FZ25 (250cc) models, as those upgraded variants feature Large-Bore Throttle Body Assembly.