24-04-19, 08:04 PM
Most leave the standard air box and put in a K&N air filter like in the picture. If you search on ebay you'll find lots of them, they're about £50. Some people have tried pod filters but I think it's been proven that they make the bike run worse.
![[Image: 5be1a8a08df77_078.jpg]](https://x.cloudsdata.net/4d/images/products/large/5be1a8a08df77_078.jpg)