Back Plate YSS3016 for YS Engine 120SR Series  [YSS3016]

Replacement rear plate for YS Engine 120SR

This back plate is supplied as a replacement rear cover suitable for YS Engine 120SR models used in RC applications. The description concentrates on correct fit and workshop procedure rather than promising performance gains, outlining how the plate interacts with the engine casing.

Fit guidance: confirm the YSS3016 model number matches your engine before buying. Fitting usually requires removing the muffler to access the rear case, aligning the back plate to the crankcase and securing it with the original screws in a controlled, even pattern.

Service function: the plate serves as a mounting face for rear-facing components and seals the crankcase. It assists with correct reassembly during a rebuild and helps maintain intended geometry; replace seals or gaskets while the engine is open to service.

Keep original screws if they remain serviceable, and inspect mating surfaces for damage or deposits before fitting to secure an even contact and dependable sealing.