YS Engine YSF5144A Back Plate Assembly for FZ53/FZ63 Engines  [YSF5144A]

Back plate assembly for FZ series

This YS Engine back plate assembly is an RC-scale replacement part specified by the original listing as YSF5144A and matched to FZ53 and FZ63 engine models. It serves as the rear cover assembly that secures internal components at the engine rear and restores proper alignment after disassembly.

In practice this part is used where the original back plate is worn, damaged, or being replaced during routine service. The component provides the seating surface for bearings and the closure for the crankcase rear, so checking mating faces and seals during installation prevents leaks and misalignment.

Installation notes: confirm model fit to FZ53 or FZ63 before fitting, clean the mounting surfaces, and re-check bearing seating and gasket condition when reassembling. Avoid overtightening fasteners and test the engine at low throttle after service to verify clearances and secure fitment.

This replacement back plate assembly is intended for hobby-grade RC engine maintenance and spares inventory, allowing straightforward restoration of FZ53/FZ63 rear-end integrity when the original part requires replacement.