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carb problem?

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carb problem?

Post  shazoak on Sun Dec 21, 2014 3:09 pm

" />Hi all.
can any one tell me why after fitting a new petrol tap/filter, the fuel line does not fully fill?.
I have had this falcon for 2 years and know it has not been started for 4 years.
tank cap vent is ok,fuel flows good when disconnected.
When i push the tickler down the pipe empties then fills again to about half way up the pipe and stops.
I think its an s25 carb ,but i am no expert.
Last week i fired her up for the first time but she only seemed to run on a carb full before dying.
I could have tinkered further but the bike is LOUD and not wanting to tick the neighbours off on a sunday morning i left it.
There are no fuel leaks anywhere ,im stumped or is this normal?." />
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filling problems

Post  piston 197 on Sun Dec 21, 2014 4:47 pm

Fuel shut off needle sticking in seat ??? or float fouling ??
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carb problem

Post  shazoak on Sun Dec 21, 2014 5:05 pm

Thanks for the reply John.
I was being lazy by not stripping and cleaning it in the bike build.
But a question is this ,if the carb has filled fully and on to half the feed pipe , then why doesn't gravity fill the pipe all the way up to the tank when the cap vent is clear or indeed when the tank cap is removed?
Regards.
Mark

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pipe fill problems

Post  piston 197 on Sun Dec 21, 2014 5:07 pm

Try fitting a longer pipe in an "S" section with a horizontal portion to remove any air locks
JH
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carb problem solved

Post  shazoak on Sun Dec 21, 2014 6:32 pm

Thanks for the replies john.
I thought maybe weight of fuel in tank?(as I only put about a liter in just in case).
I flicked the pipe no joy and then squeezed the pipe below the air lock and hey presto, the air pushed into the tank and was replaced with fuel , sorted.
Have a good Christmas all.
Mark
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Re: carb problem?

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