Fuel filter is supposed to be replaced every 24 000 miles but I would suggest this is done every 12 000 miles or 2 to 3 years.

They get quite mucky quite fast.

You can buy the Aprilia one if you don't like yourself. However, if you like yourself a little bit you can buy a Mann MWK 44 or Mahle KL145 or any of these

[[https://www.fuelfilter-crossreference.com/convert/MAHLE/KL145| Fuel Filter Cross Reference]]

However, if you really do like yourself, any __presurised__ fuel filter with an 8mm pipe in and out will do the job, many ar just £3 from an auto store. I'd be more inclined to buy cheap and replace often than using a quality item that is jam-packed with dirt.