Do it yourself
Frequently asked questions about cars and motorcycles
To replace the rear sprocket on the GasGas EC 250, loosen the bolt that secures the central spindle, which holds the rear wheel to the swingarm. Once this bolt is loosened, you can remove the spindle and take off the rear wheel. Before doing this, detach the chain from the corresponding sprocket. This will allow you to unscrew all the bolts that secure the sprocket to the centre of the wheel so that it can be replaced with a new spare part. After installing the new sprocket, reassemble everything.

Updated on 9 September 2026 by ScegliAuto

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How to replace the air filter in the Herald Classic 125?

In this tutorial, you will see how to replace the air filter in the Herald Classic 125, a very simple and quick operation. First, position yourself on the left side of the motorcycle, then grab the panel located under the seat, pull it towards you, and detach it from the frame. Next, unscrew the three fastening screws of the airbox cover, remove it, and take out the old filter from its housing. At this point, remove any dirt residue present, insert the replacement filter, and reassemble everything by following the reverse procedure.

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