Piston Wrist Pin YSG1026 for FZ70S - YS Engine  [YSG1026]

Engine wrist pin suited to FZ70S pistons

This YS Engine YSG1026 wrist pin serves as a replacement connection between piston and conrod for the FZ70S engine series, intended for hobby-grade nitro engine maintenance. The emphasis is on the component's function rather than claiming any performance enhancement.

Fitting advice: inspect piston and rod bores for wear before fitting, ensure the FZ70S retention method (circlip or pin) is correctly installed, and rotate the assembly by hand after installation to confirm free movement. Use appropriate small tools and keep a clean work area to prevent contamination.

Service guidance: treat the wrist pin as a normal wear item—replace it during an engine rebuild or if scoring is observed to help maintain alignment and reduce frictional issues. It is not a standalone tuning modification.