50ST Crankshaft Replacement for YS Engine YSS1011  [YSS1011]

High-precision crankshaft for 50ST engines

This YS Engine YSS1011 crankshaft is supplied as a direct spare for maintenance and repair of 50ST-designated scale RC engines. The description concentrates on fitment and installation considerations specific to the 50ST family and does not assume compatibility beyond that designation.

The crank functions as the rotating core of the engine's mechanism; correct journal alignment, bearing seating, and lubrication are essential when fitting the component. Refer to the engine service manual or parts diagram to verify end-play, seal requirements, and bearing sizes before assembly.

For workshop and tuning contexts, this crankshaft is presented in terms of its mechanical role rather than performance claims: it transmits piston motion to the crankcase and output shaft. Inspect the part for runout, wear on journals, and secure keying to the connecting rod during rebuilds.

Use this YS Engine YSS1011 crankshaft as a replacement when servicing a 50ST-designated RC engine, confirming bearing dimensions and clearances and following normal break-in and lubrication procedures.