YS Engine YSG1026 Piston Wrist Pin for FZ70S  [YSG1026]

Piston wrist pin for FZ70S engines

This YS Engine YSG1026 piston wrist pin is a direct replacement part listed as the wrist pin for the FZ70S engine designation in the product name, intended for hobby-grade RC nitro engine maintenance. The description focuses on the component role rather than performance claims, clarifying that the part links piston and connecting rod inside the small-scale engine assembly and is intended for routine service or part replacement.

Installation notes: inspect the piston and connecting rod for wear before fitting the wrist pin, ensure the circlip or retention method used by your FZ70S assembly is correctly seated, and rotate the assembly by hand to confirm free movement without binding after installation. Use appropriate small tools and follow safe workshop practices when handling internal engine components.

Tuning and service role: the wrist pin is a wear item within a piston assembly, replacing it during an engine refresh or after signs of scoring helps restore internal alignment and reduces incidental friction-related issues. It is intended for scale RC engine upkeep, not for full performance modification on its own.