I removed intank used inline for 35yrs. 👍

My Seca's vacuum petcock went bad and filled a cylinder. Luckily it was BDC so the exhaust valve opened when i cranked it. Replacement didnt have internal filters and wasn't vacuum, so I got the inline. I like seeing the filter so i can tell when its getting bad.

That little crummy plastic in-tank fuel filter sock (really more of a strainer) is always cracked after a shockingly short period of time and they're just generally junk filters. They fall apart in gas and then you have some of the strainer itself going into your carb. In-line filter is absolutely fine, that's why the carb has a bowl as a reservoir. Also that in-line filter is backwards, that might be why it was clogging!

I don't run a filter at all on my CJ, the petcock has a sediment trap, the socks were removed and I extended the reserve pick up to create a secondary sediment trap in the tank (it has an inch or so long nipple welded to the tank that mounts the petcock, I lose about an ounce of fuel capacity). These bikes are known to have a high load lean condition that is exasperated by adding a fuel filter when a reproduction petcock is also installed (originals are hard to find). So yes, fuel filters are an additional flow restriction, you can test it yourself with a graduated cylinder and a timer. Basic jist is does your fuel system have enough fuel flow? No? Don't do it.

I think the only additional restriction an inline filter would have is if the carb bowl can't keep up , but it's not pressure, it would be volume limiting then. Gravity fed carbs pull fuel up from the bowl. I dont trust those tube socks in the tank. They're press fit on the tube, could come off with sloshing. External filters forever!

I could not disagree more ! those filters on the petcock are not good filters they let particles through that are too big to begin with ! take them off and then you start having trouble with the petcock plugging up.... the tiny in line filter that you used as an example is not designed for high flow demands that is the problem here and yes it will restrict fuel flow ! so buy a better in line fuel filter ! those tiny inline fuel filters are used on lawn mowers not motorcycles ! I have a inline fuel filter on every motorcycle I own and have no problems with restricted fuel flow when the fuel tank gets low... they are bigger and can supply the amount of fuel needed .... and yes you need a better fuel filter than the stock fuel filter in the petcock or in the carburetor hose inlet ... if you have any questions as to if you have a fuel restriction situation going on simply pop off the fuel line from the carb and see if you have a good flow of fuel... if fuel barely trickles out then take off the gas cap if fuel flow increases you have a plugged cap vent..... the more filters, the better todays gasoline is very dirty.... and modern carbed bikes have extremely small pilot jet passageways...and they plug up very fast with no fuel filters in line. take it from someone who knows from experience.... you need more filters !