YS Engine YSF7346A Back Plate Assembly for FZ110S Engine  [YSF7346A]

Back plate for FZ110S

This YS Engine back plate assembly is a direct spare part reference listed as YSF7346A and intended for use on the FZ110S RC-scale engine family. The article focuses on the part's function as the rear closure of the engine case, its role in sealing internal components, and its place in routine engine maintenance and rebuilds.

The assembly serves as the interface for the rear bearings and crankcase sealing surfaces, helping retain internal lubricants and keep contaminants out of the combustion chamber area in RC glow engines. When replacing a worn or damaged back plate, verify mating surfaces for straightness and clean any gasket or seal surfaces before reassembly to preserve engine sealing.

Fitment note: this product name indicates compatibility with FZ110S series engines. No additional adapter hardware is listed with the part, so confirm exact fitment against your engine's service parts list before installation. The spare plays a limited tuning role, mainly by ensuring reliable sealing and bearing alignment rather than altering performance characteristics.

This spare is intended as a replacement back plate for FZ110S engines; obtain the correct service part number when planning maintenance or rebuild work to ensure proper fit and function.