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How to Change the Radiator Fluid on a Benelli TRK 502

Model: Benelli Trk 502
Part: Antifreeze coolant

Video tutorial

In today's video, you will learn how to remove and replace the radiator fluid or antifreeze on a 2020 Benelli TRK 502 motorcycle in simple and quick steps. First, position your motorcycle on a stand and unscrew the radiator drain screw located at the bottom of the engine near the gear lever; allow the fluid to drain into a container.

At this point, open the cap of the reservoir to fill it with the new fluid; then start the motorcycle and circulate the new fluid, topping up if necessary.


Updated on 14 April 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.

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by ScegliAuto

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