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Thread: CL77 Petcock/Crossover hose

  1. #1
    Member Dick Steinkamp's Avatar
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    CL77 Petcock/Crossover hose

    What is the purpose of the crossover hose. It's a royal pain to remove the tank because of it. In one of Bill Silvers writeups he says to just use a longer hose and run it over the frame rather than under the frame. Is there any downside to doing so?


    How does the fuel valve work? Is it just a matter of a short pick up vs a long pick up to produce the "reserve" function?

    Thanks.
    Dick Steinkamp
    Bellingham, WA
    1966 CL77

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    Benevolent Dictator ancientdad's Avatar
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    The petcock does have a longer and shorter feed tube that creates the "reserve" amount of fuel. The crossover hose is to get the fuel trapped in the other side of the tunnel over to the petcock side. There has been minor debate as to whether the longer hose over the frame fully delivers the fuel to the other side of the tank.
    (move along, nothing to see here)

  3. #3
    Member Dick Steinkamp's Avatar
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    Thanks, dad.

    I guess a way to test a long crossover over the frame is to run the bike out of gas and see if anything remains in the tank.
    Dick Steinkamp
    Bellingham, WA
    1966 CL77

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    Senior Member mike in idaho's Avatar
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    Get the hose full before you bolt the tank down and the gas will siphon over to the other side as needed. Honda eliminated that crossover line in their last production run of CL77s. The late tanks, with the seam down the center, don't have fittings for the crossover tube. According to one of their service bulletins, they had done some testing and had determined that part to be " unnecessary for normal operation" and had decided to delete it. Anything to save a few pennies(or a few yen) on the production line.
    '66 CL160
    '66 CB160
    '67 CL77
    '79 XS650
    '69 T100R
    '68 TR6R
    '69 T120R
    '72 750 Commando

  5. #5
    Member Dick Steinkamp's Avatar
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    Thanks, Mike!
    Dick Steinkamp
    Bellingham, WA
    1966 CL77

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