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TD42 fuel tank breathers! my gq had a strange sorta drop/cut in the revs only ever in 3rd above 2200rpm. one hard line was completely filled with wasp mud, and the one way valve was cactus. binned both, problem solved
my question is, do i NEED to run a one way valve in the breather line or is it pretty useless & am i better off extending it up somewhere and putting a little ryco inline filter instead?