Fuel Tank Crud? Redoing Fuel Lines, Etc. Options

[kenshapiro2002]

So, in my continuing fuel starvation saga (another thread), I'm almost ready to rebuild the webers. Rode her hard again yesterday, and she ran pretty nicely for awhile and eventually started to starve very hard at really hard throttle. Took a very good look in the tank, and the walls look pristine, but in the circular baffle area where the sock is, there were many very tiny pieces of black crud, and the sock, though very hard to see well, looked pretty dark too.

Opinions?

Also, I'm thinking that since my fuel filter was pretty clean, that the sock might be my real problem...should take care of that before making the carbs clean and possibly getting more crap in them.

If I do pull the tank and replace the sock, shouldn't I replace the fuel line back to the engine? Any threads on that? Can I just hook a new line up to the old and pull it through?

Thanks in advance,
Ken

[jmill]

Your on target. I would opt for inadequate fuel supply or old accelerator pump diaphrams not springing back quickly. Run the accelerator pump test but pump it a few times back to back. Does it spray nice and even through a few pumps? If no it's time to replace them. If yes then do a hard acceleration through the gears Does it go lean in the higher gears? If yes change the sock and that clicky pump. I'd still recommend bumping up the mains.

Decel pop through exhaust is most likely an exhaust leak.

[kenshapiro2002]

So...the accelerator pump test went well. I changed the mains to the new 125s. Took her out and she was running so well I took her out on the highway. There were some rough moments but again I could "punch through" them with more throttle. On the way back I jumped off the highway and took a twistie back road route. All of a sudden she started to bog down / starve...couldn't even punch through. Eventually she totally quit on me. Acted as if she were out of gas. Had to get a flat bed ride home (Good old Haggerty insurance). She still has a good accelerator pump squirt, but will not start at all. She has a 1/4 tank of fuel (visually as well as gauge). I;m thinking fuel pump? She still has a click-click-click but it's much quieter and less rapid. CB rotary somebody said?

Your on target. I would opt for inadequate fuel supply or old accelerator pump diaphrams not springing back quickly. Run the accelerator pump test but pump it a few times back to back. Does it spray nice and even through a few pumps? If no it's time to replace them. If yes then do a hard acceleration through the gears Does it go lean in the higher gears? If yes change the sock and that clicky pump. I'd still recommend bumping up the mains.

Decel pop through exhaust is most likely an exhaust leak.