Product Description
The 1125 007 1021 Spur Gear / Chain Adjusting Screw Kit is a genuine STIHL chain tensioning repair kit designed to restore smooth and accurate chain adjustment on compatible chainsaws. This kit includes the key internal components that drive the tensioner pin, allowing precise bar positioning and maintaining correct chain tension for safe, efficient cutting.
Key Features
✅ Part Number: 1125 007 1021
✅ Component Type: Spur Gear & Chain Adjusting Screw Kit
✅ Function: Adjusts guide bar position to set correct chain tension
✅ Material: Hardened steel and wear-resistant components
✅ Quality: Genuine STIHL OEM parts for exact fit and long service life
Benefits
✔️ Restores Smooth Chain Adjustment – Eliminates stiff, slipping, or non-functioning adjusters.
✔️ Improves Cutting Safety – Proper chain tension reduces derailment and kickback risk.
✔️ Protects Bar & Chain – Correct adjustment helps extend component lifespan.
✔️ OEM Precision Fit – Direct replacement for worn or damaged tensioner parts.
✔️ Reliable Durability – Built to withstand vibration, torque, and regular use.
Compatible With
Commonly suits STIHL 034, 036, MS 340, MS 360, and other 1125-series chainsaws using this tensioner configuration.
(Always verify compatibility using your OEM parts diagram.)
Installation Tips
1️⃣ Ensure the chainsaw is switched off and cooled.
2️⃣ Remove the sprocket cover, bar, and chain.
3️⃣ Remove the worn spur gear and adjusting screw components.
4️⃣ Clean the tensioner housing thoroughly.
5️⃣ Install the new kit, ensuring correct alignment with the tensioner pin.
6️⃣ Reassemble bar and chain, then set correct chain tension.
Compatible with: Stihl 026 Pro; Stihl 028 Q; Stihl 028 W; Stihl 034; Stihl 034 AVEQ; Stihl 034 AVEQ-FD; Stihl 034 AVEQW; Stihl 034 AVSEQ; Stihl 034 AVSEQN; Stihl 034 AVSEQW; Stihl 034 AVSEQWN; Stihl 034 FB; Stihl 044 R; Stihl 064; Stihl 064 R; Stihl 064 RW; Stihl 066 M; Stihl 066 MR; Stihl MS 260; Stihl MS 341; Stihl MS 361; Stihl MS 362; Stihl MS 362 C-M; Stihl MS 380; Stihl MS 381; Stihl MS 382; Stihl MS 400 C-M; Stihl MS 440; Stihl MS 441; Stihl MS 441 C-M; Stihl MS 460 Magnum; Stihl MS 460-R; Stihl MS 461; Stihl MS 461 Magnum; Stihl MS 461-R; Stihl MS 462 C-M; Stihl MS 462 C-M R Rescue; Stihl MS 500i; Stihl MS 650 Magnum; Stihl MS 660-Magnum; Stihl MS 661; Stihl MS 661 C-M Magnum; Stihl MSA 300.0 C-O; Stihl MSA 300.1 C-O
Please note: some parts are serial-number specific. Please contact us with your model and serial number before ordering, to confirm this is the correct part for your machine.
