Restore the drive performance of your mid-range chainsaw with the STIHL .325" 8-Tooth Spur Sprocket. This genuine replacement part (1125 640 2008) was original equipment on the MS 290 Farm Boss® and is engineered to provide the perfect balance of chain speed and torque. Designed for heavy-duty residential and farm use, this spur sprocket ensures smooth power transfer from the engine to the cutting chain, maintaining the reliable performance STIHL users expect.
Built to withstand the high heat and friction of demanding cutting jobs, this sprocket is compatible with a wide range of legendary STIHL powerheads. Whether you are maintaining a classic 036 or keeping a modern MS 290 in top shape, using a genuine STIHL sprocket ensures factory-spec alignment and reduces premature wear on your saw's crankshaft and clutch assembly. Replacing your sprocket regularly is essential for preventing chain damage and ensuring maximum cutting efficiency in the field.
Pro Maintenance Tip: It is recommended to replace your spur sprocket every two to three chain loops to prevent uneven wear patterns that can lead to chain breakage or reduced cutting speed.
Key Features & Benefits
- OEM Standard: The original equipment sprocket for the MS 290, ensuring a perfect factory-spec fit.
- 8-Tooth Configuration: Optimized for .325" pitch systems to provide consistent chain speed and smooth engagement.
- Wide Compatibility: Fits a broad range of STIHL saws including the 029, 034, 036, 039, MS 290, MS 310, and MS 390.
- Heavy-Duty Construction: Manufactured from high-strength steel to resist wear and heat during prolonged use.
- Genuine STIHL Part: Guarantees the highest level of safety and reliability for your professional or farm-grade chainsaw.
Technical Specifications & Fitment
| Manufacturer Part Number | 1125 640 2008 |
| Chain Pitch | .325" |
| Tooth Count | 8-Tooth |
| Fits Models | MS 290, MS 310, MS 390, 029, 034, 036, 039 - Check fitment of your current saw to ensure .325 Sprocket |
| Sprocket Type | Spur Sprocket |
