The screen on the petcock is really fine. You may choose to forego the inline filter all together. I have been running mine without an inline filter without issue. I did make sure the tank was clean, and removed some paint from around the filler cap. Excess paint bubbles and flakes off when in contact with fuel. Also, keep your fuel supply clean. I used an anodized aluminum filter for a while, but it would start to leak at the threads where it separated for cleaning. I couldn't keep the vibrations from loosening it up. Looked nice, but was a nuisance (and ultimately unnecessary).