YS Engine YSG1015 crankshaft replacement for FZ70S RC engines  [YSG1015]

Crankshaft for FZ70S

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

Technically it functions as a direct replacement crankshaft for repair or rebuild cycles, restoring internal timing and bearing seats when the original shaft shows wear. The part is supplied as a single replacement component for workshop-level engine maintenance.

Installation requires standard engine disassembly and careful reassembly: inspect connecting rod fit, torque fasteners to the engine maker's recommendations, and recheck bearing alignment during reassembly. After fitting, balance and run-in at moderate settings before full-power operation to confirm smooth rotation.

Use this crankshaft when restoring an FZ70S engine to serviceable condition, and always follow engine rebuild best practices for bearings and seals.