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Thread: Fuel line size

  1. #1
    ScubaMare's Avatar
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    Fuel line size

    WHEW! I think I finally got this on the right board.

    We just noticed tonight that my fuel hoses are pretty badly cracked. In fact, tonight when I turned the fuel supply on, gasoline came shooting out one of the lines. Could someone tell me what size fuel lines I need for my 1971 CL350? BikeBandit shows 5.5 x 8000 (assume that's millimeters and diameter by length?)

    Thanks a bunch!
    1971 Honda CL350
    (My First Bike)

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  3. #2
    Sensei 66Sprint's Avatar
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    Stephen Lohmeyer,3839 Sun Valley Lane, Roanoke, Virginia 24014 540-525-5199Sixtysixsprint@aol.com
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    Re: Fuel line size

    Yes, 5.5 mm is the bore diameter (inner)...

  4. #3
    Junior Member Jasper's Avatar
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    Re: Fuel line size

    Just joined and bought my first project. Great info on here! Is 1/4 inch comparable then? Any reason to go braided/stainless?
    1970 CB350 Project

  5. #4
    Super Moderator HerrDeacon's Avatar
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    Re: Fuel line size

    First off welcome to the site Jasper. 1/4 should be fine for the hose. No need for braided as there is no pressure and so no need for the extra strength.
    Perry

    1972 Honda CB350 / 1982 Honda MB5 / 2009 Suzuki Gladius / 1978 Honda XL250S

  6. #5
    ihatespeed's Avatar
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    Re: Fuel line size

    motion pro 1/4 inch works, but don't go thinkin you'll get away without using some sort of clamps spring or hose.. 6mm is a little closer to right, but 5.5 is nice
    Greg
    72 cl450 k5 (frame, swing arm, engine, and brakes) 78 cb550 forks, 18" alloy wheels, racetech suspension front, ikon rear, boretech ignition, Bengie's steel body work Omar's exhaust, LiFe battery.. currently 380 lbs on the hoof.

  7. #6
    Junior Member Jasper's Avatar
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    Re: Fuel line size

    Thanks y'all! I'm on the hunt for some 5.5mm in a more reasonable amount than 8000mm...
    1970 CB350 Project

  8. #7
    MNellis's Avatar
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    Re: Fuel line size

    Quote Originally Posted by Jasper
    Thanks y'all! I'm on the hunt for some 5.5mm in a more reasonable amount than 8000mm...
    The dealers here in the Austin area should have it. Try Cowboy Honda down south or Georgetown Honda up north. Be sure you use fuel line and not something else like PVC hose or vacuum hose. That stuff will harden up very quickly. You can also try a lawn mower repair shop. 1/4" might sound close but it will be to large. I think you'll find that even 6mm will be a loose fit but it will work with a good clamp.
    Mike Nellis, CMRA Expert GSXR1K 1976 Honda GL1000 1968 Honda CL350 1975 Suzuki T500 1970 Honda CB450 K3
    Yamaha 660 Raptor 2001 Yamaha YZ426F Triumph Tiger 1050 KTM 450 XCR-W

  9. #8
    Supporting Member tomh's Avatar
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    Re: Fuel line size

    Long dead post, but I came on it in searching for some information.

    I found that 3/16 inch fuel hose fits very tightly over the fuel nozzles on the petcock and the inputs on the stock Keihin carburetors. So tightly, in fact, that you have to lube the end with a little bit of oil to get it on. No clamps needed!

  10. #9
    Supporting Member tomh's Avatar
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    Re: Fuel line size

    Oh, and, if you are willing to brave AutoZone, they'll sell you solid American-made rubber fuel line in 3/16 inch size for about $1.39 a foot. Hooray!

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