Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions
In today's tutorial video, you will see how to remove and replace the spark plug of the Sym Joymax 250 scooter engine, following the instructions below. First, place your scooter on the centre stand and begin by removing the plastic cover on the left side, near the footpeg. Next, disconnect the spark plug's electrical connector, using a socket wrench with an extension to unscrew and remove it, as shown in the video. At this point, replace the old spark plug with a new one of the same thread size, screwing it in by hand and tightening gently!

Updated on 31 May 2026 by ScegliAuto

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To replace the throttle valve on the GasGas EC 300, remove the entire throttle body from its housing. This is connected between the cylinder and the intake manifold. Once the throttle body is removed by loosening the screws and disconnecting all connectors, proceed to detach the connectors attached to it. Then, the valve can be removed from inside the throttle body and the new one can be inserted. Finally, reassemble everything and check its operation.

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