Posted September 7, 201113 yr ive got a 78 xs500 on the fuel petcocks it has the bigger outlet for fuel and then the smaller one for vacuum but where do the vacuum lines go cant seem to find a spot for them
September 11, 201113 yr On my 750 it goes on the number 3 inlet at the top of the carb (right up against the cylinder head), you should see a small rubber boot thingy with a metal clip/tab, if you look you will probably see where it goes as the others have the boot and the one you want doesn't
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