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How to Replace the Crankshaft Oil Seal on KTM SX 250

Model: Ktm Sx 250

Video tutorial

In this guide, we will see the procedure to remove and replace the crankshaft oil seal and the sprocket on the KTM SX 250 enduro bike. First, remove the sprocket by taking off the circlip or metal retainer (using the appropriate pliers); then unscrew the central nut to remove the sprocket, disconnecting the chain.

At this point, proceed with the removal of the small bearing, then take out the old oil seal; lubricate the new one and insert it correctly in place, tapping with a soft material until it is seated!


Updated on 6 June 2026 by ScegliAuto


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by ScegliAuto

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