YS Engine YSF1222 Replacement Wrist Pin for 110 120 140 Series Engines  [YSF1222]

Replacement piston wrist pin for YS glow engines

This YS Engine YSF1222 piston wrist pin is supplied as a service replacement to secure the piston in YS 110, 120 and 140 series glow engines. It functions as the link between piston and connecting rod and is intended for renewal when wear leads to piston movement.

Installers should press the pin into the piston using the recommended support methods and check for correct seating and free piston rotation during assembly. Restoring a solid wrist pin fit reduces unwanted lateral piston travel, helping to maintain steady compression and smoother running across operating conditions.