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How to replace the crankshaft oil seal on the Gasgas EC 300

Model: Gasgas Ec300

Video tutorial

Discover in this video how to disassemble and replace the crankshaft oil seal on the Gasgas EC 300 enduro bike, following the instructions below. First, remove the side casing by taking off the chain; then proceed to remove the crankshaft sprocket by unscrewing the fixing screws.

At this point, use a sharp object to remove the crankshaft oil seal, replacing it with the new one; lubricate with a bit of oil and push with a soft material until it is fully seated, then reassemble everything!


Updated on 2 May 2026 by ScegliAuto


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Watch the video!


by ScegliAuto

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