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Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions
To replace the spark plug on the Vespa ET4 125, first open the seat and remove the helmet compartment under the seat to access the engine. Locate the spark plug on the right side, covered by the typical "cap". Carefully pull off the cap, ensuring not to pull on the wire. Now, use the supplied tool to unscrew the spark plug with a cross-head screwdriver, turning counter-clockwise. Given the limited space, it is advisable to use the tool only to loosen the spark plug, then continue unscrewing it by hand. Replace the spark plug.

Updated on 26 May 2026 by ScegliAuto

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