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How to Change the Engine Oil on a SYM Bonus Scooter?

Model: Sym Bonus 110
Part: Engine oil

Video tutorial

As shown in this tutorial, changing the engine oil on a SYM Bonus scooter is an extremely simple and quick operation. Before proceeding, wait for the engine to be completely cold to operate safely.

Start by placing a container underneath the engine, then locate the drain bolt and unscrew it using a 17mm spanner. Allow all the oil inside the system to drain, reinsert the bolt, and add the necessary amount of oil through the upper hole.

To check the level reached, use the appropriate dipstick.


Updated on 8 August 2026 by ScegliAuto


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In the case shown in the video, the new keys are not recognised by the ECU: the Vespa starts but does not run (thus the immobiliser is active). The solution shown in the video involves locating the immobiliser chip in the old key (the one recognised by the ECU). Open the cover on the key (only red master keys or some blue ones), remove the chip (which is a small black cylinder or rectangle), insert it into the new key in place of the new one, and try to start. Now the key will work. If the master key is red, it will definitely work. If it is blue, it might work: you need to cut the silicone; this is possible but a delicate operation. If it is a black clone key, then it is a system that does not work.

Watch the video!


by ScegliAuto

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