YS Engine YSG1044 back plate replacement for FZ70S engine spare part  [YSG1044]

Back plate for FZ70S

This YS Engine YSG1044 back plate is an RC-scale replacement part intended for use with FZ70S-designation engines, serving as the engine rear cover that maintains crankcase sealing and component alignment during maintenance.

Installation is straightforward for hobby-level workshops: remove the engine from the model if needed, drain fuel and clean external surfaces to avoid contamination, remove retaining screws, inspect the mating face and seals, transfer or replace any gasket or O-rings, align the back plate to the crankcase flange, and tighten fasteners evenly in a cross pattern to secure the seal. Use correct thread engagement and avoid over-tightening to prevent distortion.

In tuning and service contexts the back plate is a maintenance item rather than a performance modifier; it ensures proper sealing and correct placement of internal components which supports consistent engine behaviour after rebuilds and during race preparation for RC nitro models.