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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: foliver on December 24, 2023, 03:32:09 PM

Title: Good external fuel hoses
Post by: foliver on December 24, 2023, 03:32:09 PM

Hello all.
Today i've seen my 2 external fuel hoses that are dead!, i've overhauled the bike 2 year ago! 
Big shock.
I want to use good long lasting hoses, any tip?

Thanks all and happy Xmas!!

Title: Re: Good external fuel hoses
Post by: The Mighty Gryphon on December 24, 2023, 03:48:15 PM

Probably the wrong grade of hose.  What you need is SAE J30 R9. 

I suspect what you have now is SAE J30 R10 which is fuel resistant for in the tank, but can't take the heat from the engine.  That is what the R9 is for.

Title: Re: Good external fuel hoses
Post by: foliver on December 24, 2023, 03:52:11 PM

Hello Mighty!
I think you are right.
Do you have any suggestion of brand or place to buy?
Thanks !

Title: Re: Good external fuel hoses
Post by: The Mighty Gryphon on December 24, 2023, 06:00:26 PM

I would think any place that sells auto parts will have the SAE J30 R9 fuel line.  Because the specification calls out how and what the line is made of, it makes little difference who made it.

It is possible that SAE spec fuel line may not be available where you are.  In some areas the fuel line will have an ISO designation.  In that case, you should tell the counter person at the auto parts place that you need "fuel line to be used under hood for a high pressure fuel injected engine".

You DO NOT want fuel line for use in the fuel tank.

Title: Re: Good external fuel hoses
Post by: foliver on December 25, 2023, 07:45:49 AM

Hi!, thanks for your response.
Clear as water.
"You DO NOT want fuel line for use in the fuel tank": yes, i'm aware of, but i didn't knew the SAE J30 R9 specification, not a minor detail!!

Good yesr to everyone!
txs Mighty!