79XStLouis
XS650 Enthusiast
So I completely rebuilt both vacuum operated petcocks on the 79 SF Special. The one on the left trickles fuel out the end in the 'on' and 'reserve'get the positions. I was meticulous with the rebuild and have come to a theory.The inner spring must be weak. If I disconnect the vacuum line to the intake, and blow slight pressure into it, the added pressure stops the fuel dripping. If I suck on the vacuum line the fuel flows outfull blast. So do you think stretching the inner spring or adding a spacer will fix it? Anyone have thoughts on this fix / theory?
