YS Engine YSF1222 Precision Wrist Pin for 110/120/140 Glow Engines  [YSF1222]

High-precision wrist pin for glow engine upkeep

The YS Engine YSF1222 piston wrist pin serves as a direct replacement part to secure the piston in YS 110, 120 and 140 series glow engines. It performs the crucial role of joining piston and connecting rod and is intended for use during scheduled servicing or when piston side play appears.

When fitting, follow the engine maker's recommended method to press and secure the pin and verify the piston rotates freely on the pin before completing reassembly. Renewing this element helps reinstate correct piston travel and reduces side-to-side movement that can upset compression consistency and tuning repeatability.