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Post Info TOPIC: petrol tap outlet size vs carb petrol inlet tube.
tim


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petrol tap outlet size vs carb petrol inlet tube.
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Hi all , I had a split in my fuel line and when I removed it I noticed that the fuel tap outlet tube was considerably bigger than the carb fuel inlet tube . Is this normal ?  or has the wrong size fuel tap been fitted by the previous owner maybe ?  if this is normal what size replacement fuel pipe should I buy to fit the two different size outlet/inlet pipes ? The fuel line I have to hand is 5 mm internal diameter , which fits the carb fuel inlet tube perfectly but will not stretch over the petrol tap outlet tube , even after softening the fuel line in some hot water . can anyone shed some light on this ? thanks . Tim.  



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Tim - Curiosity got the better of me......... confuse

My petrol pipe dimensions are:-

Bore at carburettor

IMG_9336 carb bore.JPG

 

Bore at tap

IMG_9338 tap bore.JPG

 

Pipe external diameter

IMG_9339 dia.JPG

My pipe doesn't leak and the bike doesn't suffer from petrol starvation. It works fine. (Up till now!) smile

The difference in bore size is that I usually remove the tap end to remove the tank and consequently is disconnected more often than the carburettor end.

Martyn



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tim wrote:

Hi all , I had a split in my fuel line and when I removed it I noticed that the fuel tap outlet tube was considerably bigger than the carb fuel inlet tube . Is this normal ?  or has the wrong size fuel tap been fitted by the previous owner maybe ?  if this is normal what size replacement fuel pipe should I buy to fit the two different size outlet/inlet pipes ? The fuel line I have to hand is 5 mm internal diameter , which fits the carb fuel inlet tube perfectly but will not stretch over the petrol tap outlet tube , even after softening the fuel line in some hot water . can anyone shed some light on this ? thanks . Tim.  


 Use 6mm ID fuel line!

The fuel hose is supposed to be larger at the tank than the carburettor, not that it needs to larger though.

Jarrah

 



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tim


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ok , thanks. I will give that a go . 



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