YS Engine YSS3016 Back Plate for 120SR engine spare part  [YSS3016]

Back plate for 120SR engines

This back plate is an RC-scale spare designed to replace the rear cover on YS Engine 120SR series units. The text here focuses on practical fit and function rather than performance claims, describing how the part interacts with the engine assembly and workshop procedures.

Fit notes: the part number and 120SR designation in the product name indicate the intended engine family, so confirm the YSS3016 code matches your engine before ordering. Typical installation requires removal of the muffler and access to the engine rear case, followed by careful alignment of the back plate to the crankcase and secure fastening with the original screws.

Tuning and service role: the back plate provides a structural mounting surface for rear-facing components and seals the crankcase. During rebuilds it supports accurate reassembly and helps maintain the intended internal geometry; use it as part of routine maintenance when replacing worn seals or inspecting internal components.

Keep original fasteners and inspect mating surfaces for burrs or deposits before installation to ensure a clean fit and reliable sealing during engine operation.