61H Series Sub Needle Replacement for Carburettors - YSR6202S compatible with 61H series by YS Engine  [YSR6202S]

61H-series sub needle details

This sub needle is a direct spare part labeled YS Engine YSR6202S for use with 61H-series carburettors on RC glow engines. It acts as the replaceable needle that regulates fuel flow at idle and across the midrange, designed for model engine tuning and maintenance tasks.

For installation, follow standard carburettor access steps: remove the carb top or needle holder as required by your carb design, replace the old sub needle with the YSR6202S, and check for smooth travel before reassembly. No specialist equipment is normally required beyond common small screwdrivers or hex drivers.

In tuning situations, this sub needle influences metering in a narrow portion of the throttle band; make careful, incremental changes and test the engine under safe conditions. If problems persist after fitting, inspect needle seating and the carb linkage for correct adjustment.