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  • Unknown part

    So I was checking my vent tube going all the way back to the end of the tube and this was online which is im guessing a ball valve of sorts.. problem is I didn't pay attention to the direction it was instead because it seems I can only blow air through one direction. Any help would be greatly appreciated.
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  • #2

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    • #3
      Yes thats the part but my question is which end is up, theres no arrow showing direction of flow. If I hold it vertical in one direction I can blow air through it but if I flip it over and try I can't blow through it. I'm assuming it goes in the direction that I can blow air through it in the downward position?

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      • #4
        Looks like the rollover valve I removed and spliced the two hoses with a metal, plastic or similar tube. I tossed it in the trash. Don't recall which end is "UP" if reinstalling.
        Scotto

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        • #5
          This is how mine was when I removed it. I wrote the orientation on it when I removed it in case I would ever need to reinstall it later.

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          • #6
            It should let air into the tank and prevent fuel from coming out of the tank so do some experimentation to see how it would be oriented.

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            • #7
              https://www.yamahasportsplaza.com/oe...0c70/fuel-tank

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              • #8
                It's a double acting check valve, that lets small volume of air move in both directions when setting upright. They seem to easily malfunction, which causes a lot of fuel problems. Like scotto and many members on this form, I removed mine and replaced with a connector.

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                • MikeyC
                  MikeyC commented
                  Editing a comment
                  I've done the same, replace with piece of tube

              • #9
                Yeah I'm wondering if that was the culprit for my gas tank building pressure and when I tried to remove the gas cap it was like mt saint belen... it just erupted and went everywhere.

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                • scotto
                  scotto commented
                  Editing a comment
                  Keep us posted.

              • #10
                spot on Duke, it connects to tankvent, and allows fumes out , but also prevents liquid out in an event. IN the heat of florida, with black bike, if you bend down and look at bugs eye view, you can see the distortion of objects due to the ginormous amount of gasoline fumes spewing out from below the motor scooter. if that bad boy gets broke, or bugs move in, that would increase fuel tank pressure, and contribute to carb puke. er , shit, havent checked that on my trike yet.

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