YS Engine YSF1222 Engine Wrist Pin – Compatible with 110, 120 & 140 Models  [YSF1222]

YS ENGINE PISTON WRIST PIN 110 120 140 #F1222
Price:
£4.25
Brand:
YS Engine
Model:
YSF1222
GTIN:
4560105731088
Condition:
Brand New
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Service wrist pin for piston retention

The YS Engine YSF1222 piston wrist pin is a replacement component intended to secure the piston in YS 110, 120 and 140 series glow engines. It connects piston and rod and is used when the original pin shows wear or allows unwanted piston movement.

During reassembly, fit the pin using the engine maker's recommended press-fit procedure and confirm the piston rotates correctly on the pin. Renewing the wrist pin restores proper piston location and helps reduce side-to-side motion that can affect compression and day-to-day running consistency.

How do I know the pin needs replacing?

Look for increased piston play, scoring on the pin, or inconsistent compression; any of these signs indicate the wrist pin should be replaced rather than reused.

What is the correct assembly check after fitting?

After installation, ensure the piston turns smoothly on the pin and that there is no binding or excessive lateral movement; confirm clearances match the engine's service specifications.

Will replacing the wrist pin improve engine reliability?

Yes, fitting a correct, undamaged pin reduces piston wobble and helps maintain compression stability, which supports more reliable running and predictable tuning behavior.

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