DZ140 Carburetor Restrictor Insert for Fine Tuning - YS Engine YSF2193  [YSF2193]

DZ140 carburetor restrictor details

This restrictor set is an RC-scale carburetor component supplied under the YS Engine YSF2193 designation and intended for use with DZ140 glow engines. It functions as a replaceable flow restriction fitted in the carburetor throat to alter airflow and allow finer control of fuel/air mixture during idle and throttle transitions.

Made for model-level adjustments rather than broad performance claims, the insert helps refine how the engine reacts to needle changes and stabilizes low-speed running. Because the set targets small mixture changes, it is typically used when subtle adjustments to idle or transition response are needed during on-track setup or bench testing of a model engine.

Fitment follows the carburetor and engine manufacturer's recommended procedures; the insert is an accessory for RC model engines and should be fitted only where the DZ140 carburetor design accepts a restrictor element. Users must confirm fitment against their carburetor bore and follow safe handling for glow-engine fuel systems.