(Problem also posted onto group on Facebook - the only reason I still use it)
I've been fettling my 1976 CB500 K2 - New Dyna S electronic ignition, new battery, reset float levels, that sort of thing. The carbs were NOS around 8,000 miles ago but as the bike hasn't been used nearly enough, it has stood dry for a few years. Last year I gave them a thorough clean, changed the O rings etc. and brought the bike back to something approaching a smooth runner again after the usual battery charging problems.
This time around having fitted the Dyna S and reset the float levels (they were out by quite a lot) I thought I'd check that fuel was getting to the float chambers by removing the drain screws. Only a couple of drops of fuel on each one, I was expecting it to be flowing freely. Moving up the chain, the petcock and fuel lines are new, the tank filter is clean, fuel runs freely from the tap and the tank breather is OK too.
Blowing down the fuel lines to the carbs it seems completely blocked. Once I've split the carbs and I blow down a pipe attached to the T fuel connector (blocking the line that connects to the tank) it feels blocked too on each carb.
I've checked everything else in the carbs as best I can and they seem clear.
So my question is - If I blow down the fuel line, should it feel blocked or is there a way of clearing the fuelway from the T connector into the carb? As this is the same for all the carbs I can't believe it's a simple blockage, I must be doing something wrong.
I'm looking to get fuel flowing freely to the bowls so it comes easily out of the drain plugs again.
Has anyone experienced this before and can they help?
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