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How to Replace the Spark Plug on a Sym GTS 300i

Model: Sym Gts 300i
Part: Spark plugs

Video tutorial

Today, we will guide you through the process of removing and replacing the spark plug on the Sym GTS 300i scooter engine. First, place the scooter on the centre stand and begin by removing the rider's seat; then, take out the under-seat compartment to access the upper part of the engine, as shown in the video.

At this point, disconnect the spark plug's electrical connector and use a socket wrench with an extension to remove it, replacing it with the new one; install the new spark plug, ensuring it has the same thread pitch, hand-tighten it, and then tighten it with a spanner!


Updated on 27 September 2026 by ScegliAuto


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Watch the video!


by ScegliAuto

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