Teflon Tape ?
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  1. #1
    Member nyweb's Avatar
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    Teflon Tape ?

    Is it a good idea to use Teflon Tape when replacing the Petcock ?
    1980 CM400E

  2. #2
    Senior Member 76TWIN's Avatar
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    Yes it's fine to use Teflon tape since it's fuel resistant.
    '76 CB500T Frankenbike
    '73 CL450 (basket case for now)


    Carpe narem.

  3. #3
    Member nyweb's Avatar
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    Thanks !
    1980 CM400E

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  5. #4
    Senior Member mike in idaho's Avatar
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    You shouldn't need anything like teflon tape if the rubber seal between the tank and the petcock is in good condition.
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  6. #5
    Senior Member Richard_Pitman's Avatar
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    Two types of petcock.

    One bolts to the bottom of the tank, using an elliptically shaped 'O' ring for a seal.

    Other type screws onto a spigot, and I'm guessing this is where the Teflon tape might be used, although having said that my CL tap doesn't leak, there is a rubber O ring inside the captive nut on the fuel tap.

    Name:  spigot2.JPG
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Size:  12.9 KBTeflon Tape ?-spigot.jpg Teflon Tape ?-spigot3.jpg
    Last edited by Richard_Pitman; 10-20-2019 at 09:58 AM.
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  7. #6
    Member nyweb's Avatar
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    Yeah.....thinking about it it looks like the o-ring is all that's needed.
    1980 CM400E

  8. #7
    Senior Member Rscottp's Avatar
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    I have used teflon tape and it worked fine, I have also done it without anything and that works fine too.
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  9. #8
    Member nyweb's Avatar
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    Maybe the Teflon would keep the threads a little cleaner even if it does nothing to seal.
    1980 CM400E

  10. #9
    Member doctorruckus's Avatar
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    I replaced mine without using the tape and it's working fine. I say go without. The o-ring and left handed nut work great.
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  11. #10
    Supporting Member krukster86's Avatar
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    I used teflon tape on my front brake bleeder screw to stop a really slow leak. Didn't have to use it on a new fuel tank petcock, just needed to crank it down quite a bit.
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