The STIHL 1143 640 1701 Chain Sprocket Cover is a genuine OEM side cover designed to protect the clutch and drive sprocket assembly on selected STIHL chainsaws. This cover also provides the mounting point that secures the guide bar in place while shielding the internal drive components from debris and impact during operation.
Fitment:
- Stihl MS 231
- Stihl MS 251