How to Replace the Transmission on a Husqvarna SM 125

Model: Husqvarna Sm 125
Part: Drivetrain

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To replace the transmission on a Husqvarna SM 125, first remove the old sprocket and install a new one, following the steps shown in the video. Next, mount the new sprocket on the rear wheel after removing it. To fit the sprocket, position it and insert the appropriate fixing screws.

Once the screws are tightened, you can insert the chain, passing it between the sprocket and the sprocket and tensioning it. Finally, insert the pin that secures the wheel to the rear swingarm.

Updated on 8 May 2026 by ScegliAuto

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by ScegliAuto

How to Replace the Transmission on a Husqvarna SM 125

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