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Fuel tank breather vent hole, GS750?

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    Fuel tank breather vent hole, GS750?

    Hi All
    I am aware that the GS750 fuel petcock runs with a vacuum from the carbs, but can anyone tell me if the fuel tank has a vent hole to prevent a vacuum building up inside and stopping the fuel flowing?

    I am getting some engine problems and when I stop for petrol there is a big “hiss” when I remove the tank cap.

    Regards
    Adi

    #2
    Cap has a vent. Yours is blocked.
    Rich
    1982 GS 750TZ
    2015 Triumph Tiger 1200

    BikeCliff's / Charging System Sorted / Posting Pics
    Destroy-Rebuild 750T/ Destroy-Rebuild part deux

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      #3
      Good man, thank you. I thought there must be one. Bit odd though as the fuel tank cap I have was a brand new OEM cap I bought a year ago and hasn’t seen much use. I will give it a check over.

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        #4
        soak it in vinegar overnight then spray a lot of air up under the chrome cap. theres a chanell in there for air and compessed air will flush out what the vinegar breaks up.
        MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
        1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

        NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


        I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

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