Do it yourself
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This guide will show you how to remove and replace the spark plug on the Honda Silverwing 400 scooter. First, place the scooter on its stand and open the seat by removing the cover located at the bottom to access the cylinder head; then disconnect the spark plug connector and use a socket spanner with an extension to unscrew and remove it, as shown in the video. At this point, install the new spark plug of the correct type and with the same thread pitch; screw it in by hand and then tighten it with the spanner, finally securing the upper connector.

Posted on 26 March 2026 by ScegliAuto

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