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CB750 Barn find project - First Timer
Underdog1:
--- Quote from: Bryanj on September 04, 2018, 07:32:13 AM ---There is your problem as they should be thick fibre washers that you can not get genericaly. I have used 6mm "Dowty" style washers with some success. If a total seal does not happen fuel leaks down past the bolt threads and bypasses the tap flooding the float bowls
--- End quote ---
Aha nice that would explain part of it, but the bowls overflowing is a separate issue I think
UPDATE: just under £14 to have 2 delivered from DS..
K2-K6:
As above, even with fuel tap leaking (if confirmed) the float bowls should be limited by the float closing the supply with needle valve.
I know they can be iffy, but if all clean they generally work ok.
I'd still work to confirm those internal "weir" tubes are not leaking. If you have just one (put each one into a jamjar to verify) then swap float bowl with another to see if problem switches with it.
Bryanj:
With hravity feed from tank and engine off float needles have to be perfect to stop flow. With screws sealed you should not get more leakink and floats will seal enough for normal running as long as you remember to turn off when stopping engine. I think this was one of the reasons vac taps became more common
Underdog1:
--- Quote from: Bryanj on September 05, 2018, 02:13:37 AM ---With hravity feed from tank and engine off float needles have to be perfect to stop flow. With screws sealed you should not get more leakink and floats will seal enough for normal running as long as you remember to turn off when stopping engine. I think this was one of the reasons vac taps became more common
--- End quote ---
Yeah will investigate further this weekend, have ordered a few of those dowty washers you mentioned, will hopefully have some luck. The seats at the upholsterers so can’t ride anyway
Bryanj:
If using dowty washers you might get better results using allen bolts instead of screws as the underside of the head is better
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