Honda-SOHC
SOHC.co.uk Forums => CB350/400 => Topic started by: watty51 on May 07, 2019, 08:31:26 PM
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Is there a specified flow rate for fuel leaving the fuel tank.
Basically I have held a old float bowl under a fuel hose coming from the petrol tank petcock and it took over 2 minutes to fill to the correct level.
More of a dribble on both the on position and reserve, and with the cap open and shut, makes no difference
Seems a bit slow to me but as I have no reference to go by I was hoping someone could help.
Many thanks the bike is a Cb350f
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Sounds much too slow, I don’t have an exact figure. There is a circular brass filter screen inside the tap, sounds like that might need a good clean. You need to undo the bottom bowl of the tap to remove it. Easier with the tank off the bike and on its side on a cushion. There is an o ring above the bowl. Might be worth removing and cleaning the tap. It’s held on with two screws one outside and t’other one above the screen. Another shaped o ring between tap and tank.
Ian
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Recheck the flow with the filler cap open to eliminate a blockage in the fillercapvent. It's most likely to be the fuel filter, blocked up with rust.
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As above. The screens can get totally smothered with crap from the tank. Having drained my CB400/4 tank in the past via the petcock I would say a float bowl should fill within about 2-3 seconds.
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Blimey 2 to 3 seconds I’ll def give the whole petcock a good clean out.
I’ve tried checking with the fuel tank cap open and closed, made no difference at all to the flow rate.
Is there a quick way of getting the fuel out of the tank rather than using the petcock. At the rate it’s flowing I’ll be waiting a week
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If you have a container with a really big opening, like a bucket, you can pour it out of the filler cap. Definitely sounds like a good clean / overhaul of the petcock will work wonders.