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Model: Ktm Duke 125
Part: Spark plugs

In today's tutorial, you will learn how to replace the engine spark plug on the KTM Duke 125, as well as the Duke 390. First, remove the fuel tank by taking off the rider's and passenger's seats; then unscrew all the screws on the sides, disconnecting the electrical connector and the fuel line. At this point, remove the spark plug cap or connector from the cylinder head; then use a socket spanner with an extension to unscrew and remove the spark plug, replacing it with a new one (with the same heat rating).

Updated on 10 June 2026 by ScegliAuto

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