YS Engine YSS1016 Rear Cover Plate for 50ST Engines  [YSS1016]

Rear cover duties and correct fitment

This YS Engine back plate is identified by reference YSS1016 and serves as the correct replacement for the 50ST engine family described in the model name. It functions as the rear housing component that positions mounting points, retains the internal assemblies, and provides access during engine disassembly for service.

The write up emphasises correct fit and workshop practice rather than making material claims. Fit this plate when removing the engine rear cover for scheduled service, inspection, or when replacing worn items. Verify the YSS1016 marking and the physical profile before you install the part.

Assembly notes: remove the engine from its mount when practicable, follow the factory fastener sequence, and keep any gaskets or seals with the plate during removal. Begin bolts by hand to check alignment before torquing, and inspect mating faces for debris or damage to ensure a good seal. Renew seals if they show wear to maintain reliable operation after reassembly.

Workshop role: the back plate gives access for internal checks and minor adjustments without directly altering tuning settings, but correct, square mating faces and proper assembly help preserve baseline performance. Keep a spare YSS1016 in your workshop spares to speed up repairs.