YS Engine YSF2193 Restrictor Set for DZ140 Carburetors - Precision Tuning  [YSF2193]

Precision restrictor for DZ140 carburetors

This restrictor set is an RC carburetor component sold under the YS Engine YSF2193 designation and designed for use with DZ140 glow engines. The part installs in the carburetor throat as a replaceable flow insert to modify airflow and allow more precise fuel/air mixture control during idle and throttle changes.

Intended for tuning rather than dramatic power claims, the insert helps refine engine response to needle adjustments and improves low-speed stability. Because it affects subtle mixture behavior, modelers typically apply it when small corrections to idle or transitional running are required during track setup or bench testing.

Installation should follow the carburetor and engine maker's instructions; this component is an accessory for RC model engines and must only be fitted where the DZ140 carburetor accepts a restrictor element. Always confirm physical fit and observe safe handling for glow fuel systems.