Upgrade or replace the Stihl chain sprocket cover (Part No. 11236401705 / 1123-640-1705) with the original OEM component featuring a quick-tension system. Designed for simple, tool-free chain adjustment and perfect fit on MS 170, MS 180, MS 210, MS 230, MS 250, and compatible 017/018/021/023/025 models. Durable, factory-matching design ensures safety and performance.

✅ 100% Genuine Stihl OEM chain sprocket cover — engineered for precise fit and compatibility
✅ Quick-tension system — simplifies chain adjustments without tools
✅ Durable plastic housing — protects chain components and enhances safety
✅ Easy swap-in replacement — matches original factory installation design
✅ Compatible with MS 170, MS 180, MS 210, MS 230, MS 250, and 017/018/021/023/025 models