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To replace the spark plug of the Vespa Lx 125, open the seat, remove the helmet compartment, locate the spark plug cable near the fairing, disconnect the electrical connector, and using a spark plug socket, unscrew it. Take the new spark plug out of the box, check that its measurement matches the original, insert it into its seat, screw it in with the spark plug socket, reconnect the electrical connector, reposition the helmet compartment, and close the seat. Finally, try to start the scooter to check the operation of the new spark plug.

Updated on 9 July 2026 by ScegliAuto

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