YS Engine YSF5144A Replacement Rear Cover for FZ53 and FZ63 Engines  [YSF5144A]

FZ53 & FZ63 rear cover and fitment notes

The YS Engine back plate listed as YSF5144A is supplied as a replacement rear cover for FZ53 and FZ63 engines. It serves to close the crankcase at the rear and secures the internal components, restoring proper rear-end alignment after disassembly.

This part is typically used when the original back plate is damaged or removed during maintenance. It provides the seating for bearings and a closure for the crankcase rear; careful inspection of mating surfaces and gaskets during fitting helps avoid leaks and misalignment issues.

Fitment guidance: ensure the part matches your FZ53 or FZ63 model prior to installation, clean mounting interfaces, and re-check bearing seating and gasket condition during reassembly. Tighten fasteners to recommended levels and perform a low-throttle run to confirm fitment and clearances.

Intended for hobbyist engine maintenance and spare parts inventories, this back plate aids in restoring the rear-end integrity of FZ53/FZ63 engines when the original component is worn or damaged.