YS Engine YSS1011 crankshaft 50ST replacement part for RC engine spares  [YSS1011]

Crankshaft for 50ST RC engines

This YS Engine YSS1011 crankshaft is presented as a direct spare part entry for scale RC engine maintenance and repair. The text focuses on fitment context and installation considerations for the 50ST family indicated in the product name, without assuming further cross-compatibility beyond that designation.

The component functions as the rotating assembly core for the crank mechanism in a model engine, so correct alignment, bearing seating, and lubrication are critical during installation. Check the engine's service manual or parts diagram to confirm fitment patterns, end-play allowances, and required seals before installation.

For tuning and workshop use, this crankshaft is described here in terms of its role rather than performance claims: it provides the mechanical interface between piston motion and the crankcase/drive output, and must be inspected for runout, wear on journals, and secure keying to connecting rods during rebuilds.

Use this crankshaft as a replacement component when servicing a 50ST-designated RC engine, verifying bearing sizes and clearances during reassembly and following standard engine break-in and lubrication practices.