YS Engine YSG1044 Rear Cover Replacement for FZ70S Engine  [YSG1044]

FZ70S rear cover overview

The YS Engine YSG1044 back plate functions as a replacement rear cover for FZ70S-marked engines, preserving crankcase sealing and ensuring correct alignment of internal components during maintenance operations.

Fitting is straightforward for experienced hobbyists: remove the engine from the model if convenient, evacuate fuel and clean the outer surfaces to avoid introducing debris, remove the mounting screws, inspect the mating face and any seals, replace or transfer gaskets or O-rings as required, position the plate against the crankcase flange, and tighten fasteners in an even cross pattern to seat the seal. Use correct thread engagement and take care not to over-tighten to prevent distortions.

This part is intended as a maintenance replacement rather than a tuning upgrade; it secures correct sealing and component placement so the engine maintains consistent operation after service and rebuilds.