YS Engine YSF5144A Back Plate Replacement for FZ53 FZ63 Engines  [YSF5144A]

Rear cover specification for FZ engines

The YS Engine back plate identified as YSF5144A is supplied as an RC replacement for FZ53 and FZ63 engines. It serves as the rear closure that secures internal parts and helps re-establish correct crankcase alignment after work on the engine.

This unit is fitted when the original rear plate is compromised by wear or damage or when refreshing components during scheduled service. It forms the seating surface for bearings and seals the crankcase rear; careful inspection of mating faces and seals during installation reduces the chance of oil or air leaks.

Installation advice: verify compatibility with FZ53 or FZ63 before fitting, thoroughly clean mounting surfaces, and inspect bearing seats and gasket condition during reassembly. Use caution with fastener torque and perform a controlled low-throttle check run to confirm fitment.

Suitable for hobbyist engine maintenance, this replacement back plate helps maintain the rear-end integrity of FZ53/FZ63 engines when the original component requires service or replacement.