Replacement Crankshaft for 50ST YS Engine YSS1011  [YSS1011]

Replacement crank for 50ST engines

The YS Engine YSS1011 crankshaft is listed as a spare for engines identified with the 50ST designation. The item description emphasizes correct fitment and installation for the 50ST family and does not imply compatibility with other engine series.

Functionally, the crank is the central rotating element of the engine; correct bearing seating, alignment of journals, and proper lubrication are crucial during installation. Always refer to the engine's parts diagram and service instructions to confirm dimensions and required seals.

During rebuilds or tuning work, handle this crankshaft as a precision mechanical component: check for runout, journal condition, and secure keying to the connecting rod before reassembly and break-in.

Install the YS Engine YSS1011 crankshaft when servicing a 50ST engine, confirming bearing sizes and clearances and following standard lubrication and break-in routines.