FZ70S Crankshaft Replacement - YSG1015 by YS Engine  [YSG1015]

FZ70S Engine Crankshaft (YSG1015)

This crankshaft is the OEM-design spare listed as YS Engine YSG1015 for the FZ70S RC engine family. It functions as the rotating core that converts piston motion into drive output at model scale and is intended solely for model engine use.

As a direct replacement, it restores internal timing and bearing seats during repairs or rebuilds when the original shaft shows wear. The part is supplied as a single replacement component for workshop-level engine maintenance.

Installation follows standard engine overhaul procedures: disassemble carefully, inspect connecting rod fit and bearing seats, torque fasteners to the engine maker's recommendations, and recheck alignment. After fitting, balance and perform a controlled run-in at moderate settings to confirm smooth rotation.

Use this crankshaft when restoring an FZ70S engine to serviceable condition, following accepted rebuild practices for bearings and seals.