Hi Shaun
To change the air filter you do need to remove the battery and bend the metal strap towards the rear wheel and with a struggle you can remove the back of the air box to get to the filter.There is a K& N filter that fits the Benelli air box Selwyn knows the number of the filter. Any new air filter will need to be squashed to an oval shape before fitting though.You have to be very patient to fit a Benelli air filter not easy!