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1981 Fuel Petcock?

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    1981 Fuel Petcock?

    My 1981 GS750L i just got does not have the knob on the petcock, but has a slot thing in there u can stick a small flat head in and it turns freely

    All it says on it is PRI..no ON or RES

    Should this be turned off do i need to get a new one

    #2
    That is the factory petcock, it's vacuum operated. There isn't any off position. Pri is used to fill the carb bowls after it's been sitting unused for a while. The L models with that tank and petcock also have no reserve position. On is straight up and down, Pri is horizontal as I recall. I may be wrong, it might be opposite.

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      #3
      That is the dreaded '80 petcock. Your bike may be an '80.......or your bike may in fact be an '81, and someone has switched out the petcock to an '80.
      Larry D
      1980 GS450S
      1981 GS450S
      2003 Heritage Softtail

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