One of the elements which requires the utmost attention is the air filter, because if water gets in there it would be a big problem. When returning to the pits, therefore, it is necessary to remove the filter and blow it out with the compressor, making sure the no water is left inside it. Once the filter is reassembled, if you have to go back onto the track, you need to cover the air intake holes in order to prevent the water from getting inside and reaching the carburetor. On the market there are various products available which provide a suitable cover to be used in case of rain, otherwise, following an artisan method, you can use the number plates or some small plastic water bottles cut with an appropriate knife.