STIHL 1125 007 1021 Chain Tensioner Kit (OEM Chain Adjuster Kit)

Restore smooth, reliable chain adjustment with the STIHL 1125 007 1021 Chain Tensioner Kit, a genuine OEM replacement chain tensioner kit designed to keep your bar and chain properly tensioned for safer cutting, cleaner performance, and longer component life. This complete kit includes the spur gear and tension screw, making it an ideal fix for worn, stripped, or damaged chain adjusters that cause slack chain issues or inconsistent tensioning.

Built to STIHL’s OEM standards for precision fit and durability, this chain tensioner set helps ensure your chainsaw maintains proper chain tension during operation—reducing premature wear on the bar, chain, sprocket, and clutch components. Perfect for professional cutters and homeowners alike, this OEM tensioner kit is a must-have for routine maintenance or repair.

✅ OEM Part Highlights

• OEM STIHL Part Number: 1125 007 1021

• Part Type: Chain Tensioner / Chain Adjuster Kit

• Kit Includes: Spur gear + tension screw

• Helps maintain proper chain tension

• Prevents chain slack, poor cutting, and bar/chain wear

• Designed for direct replacement of original tensioner components

Fits STIHL Models (Model Numbers Only)

024, 026, 028, 034, 034 S, 036, 044, 046, 064, 066, MS 260, MS 261, MS 270, MS 280, MS 341, MS 360, MS 361, MS 400, MS 440, MS 441, MS 460, MS 461, MS 462, MS 500i, MS 660 Magnum, MS 661, MSE 220, MSE 250 C-Q, MSA 300, MSA 300.1, E 220

Why Replace the Chain Tensioner?

A worn or stripped tensioner can lead to:

• Chain that won’t stay tight

• Uneven cutting or chain derailment risk

• Excess bar/chain wear

• Poor saw performance and extra downtime

Replacing your tensioner with the STIHL 1125 007 1021 OEM kit helps bring your saw back to proper working condition fast.

✅ Pro Tip: Always verify fitment by model and your saw’s serial range when applicable, and inspect the adjuster pocket and bar stud area for damage before install.