SOHC.co.uk Forums > CB750

help...leaking overflow...again

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whiteylfc:
has anyone got any tips to stop the flaming nuisance of the carb overflows leaking on my CB750 F2 Honda Britain...If I havnt used it for a while,one of the 4 carbs will start free flowing petrol out of it,usually necessitating a carbs off fiddle around and half a day wasted.The carbs had been professionally rebuilt with new seals,floats,etc,so shouldn't need anything new.Any tips for cleaning out the carbs without taking them off??   John

steff750:
 ;) I feel your pain been there done that wasted half my life tinkering with carbs they need to be used,I just ride mine with the fuel tap off and turn it on when I have rode a few hundred yards they settle down after a while. you can try leaving the bike on the main stand if you park it up for any length of time and leave the petrol on as long as possible before stopping engine at least the bowls will be full and the floats all be up ,I suspect you have a float bowl sticking down they have a tendency to stick if left on side stand for too long, when you start the bike hopefully you will still have enough fuel to start the bike and warm it up then turn on the petrol after about a minute if you are not to worried about petrol spilling on the road then ride the bike with the petrol tap turned off and when the big starts to die of fuel starvation turn on the tap and hope the floats do their job

UK Pete:
I would make sure you have a good inline fuel filter in place , and check the float height it might just be that your carb guy set them a bit out, i have a proceedure where i shut off the petrol tap at the end of my road so i then use up some of the fuel in the bowls as i ride on this has stopped all sorts of garage smelling of fuel problems on some of my bikes
pete

whiteylfc:
thanks for the tips guys.the bike had a new inline filter which hasn't cured the problem when I've left the bike for a few weeks.i have been leaving it on the sidestand in the garage and I can see how this could cause a problem.i'll give the other tips a go as well before I get the bloody spanners out again......john

Bryanj:
You need an old wooden handled screwdriver to whack the float bowls with---wooden end that is

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