Replacement Back Plate for 91SR3C YSS9216 - YS Engine  [YSS9216]

Replacement Back Plate for 91SR3C

This YS Engine YSS9216 back plate is an RC-scale spare made to suit the 91SR3C engine family and is intended for repair and maintenance work. It provides the rear closure for the crankcase and is offered as a service replacement rather than a performance upgrade.

Fitment is restricted to the 91SR3C as indicated in the product title; do not assume compatibility with other YS Engine models without confirmation from the maker. The item is supplied as a single replacement plate to restore sealing and correct alignment where the original has been removed or damaged.

Installation checklist: clean mating surfaces thoroughly, remove any old gasket residues, check for burrs, and tighten fasteners in the recommended sequence to avoid warping the crankcase. Replace gaskets or O-rings only with parts specified for the 91SR3C or equivalent OEM items.

Service implications: while the back plate will not alter engine timing, proper fitment helps maintain crankshaft alignment and crankcase sealing which are relevant to consistent engine response and tuning. Inspect the plate for straightness when rebuilding and fit a replacement if it is bent or compromised.

For enthusiasts carrying out engine teardown or repairs, the YS Engine YSS9216 back plate is the intended spare to reinstate the 91SR3C rear case closure.