Product Description
The 1125 640 2006 Chain Sprocket (3/8" 7T) is a genuine STIHL drive sprocket designed to transfer engine power efficiently from the clutch to the chain. Engineered for smooth engagement and consistent chain speed, this sprocket plays a key role in maintaining reliable cutting performance, reduced drivetrain wear, and correct chain tracking.

Key Features
✅ Part Number: 1125 640 2006
✅ Component Type: Chain Sprocket
✅ Pitch: 3/8"
✅ Tooth Count: 7T
✅ Function: Drives the saw chain from the clutch assembly
✅ Quality: Genuine STIHL OEM part for exact fit and long-term durability

Benefits
✔️ Smooth Power Transfer – Delivers consistent chain speed under load.
✔️ Reduces Chain & Bar Wear – Correct tooth profile ensures proper chain engagement.
✔️ Improves Cutting Efficiency – Maintains optimal chain speed for clean cuts.
✔️ Durable Steel Construction – Built to handle heat, torque, and high RPM operation.
✔️ OEM Fitment – Direct replacement for worn, hooked, or damaged sprockets.

Compatible With
Commonly suits STIHL 034, 036, MS 340, MS 360, and other 1125-series chainsaws using a 3/8" 7-tooth sprocket.
(Always verify compatibility using your OEM parts diagram.)

Installation Tips
1️⃣ Ensure the saw is off and completely cool.
2️⃣ Remove the sprocket cover, guide bar, and chain.
3️⃣ Remove the clutch drum to access the sprocket.
4️⃣ Replace the old sprocket with the new 3/8" 7T unit.
5️⃣ Reassemble all components, set correct chain tension, and test for smooth rotation.