YS Engine YSG1044 Back Plate for FZ70S Engine Spare Part  [YSG1044]

FZ70S back plate specification

The YS Engine YSG1044 back plate provides a replacement rear cover for FZ70S-designated engines, helping to preserve crankcase sealing and maintain correct alignment of internal components during overhaul and servicing.

Fitting guidance: remove the engine from the model if that makes access easier, drain fuel and clean external surfaces to avoid contamination, remove the retaining screws, assess the mating face and seals, swap or reinstall gaskets or O-rings as appropriate, align the back plate to the crankcase flange, and tighten the fasteners evenly in a cross pattern to secure the sealing surface. Use proper thread engagement and resist over-torquing to avoid distortion.

As a maintenance replacement, the back plate does not act as a performance upgrade but ensures proper sealing and assembly so the engine performs consistently after service and rebuilds.