2004 Z750 fuel problem ? Help Please

[nige777]

Hello all i am new to this forum this forum and in need of help .
2004 Z750 19500 miles runs like new with full tank of fuel .

use 1/4 tank fuel and feels like bike starts to starve fuel . fill up tank and great again .

Have put new

fuel pump
filter
fuel pressure regulator
plugs
coils
air filter
cleaned breather/vacuum and water drain
and still does the same thing .

any info would be great Thanks Nige

[billinom8s]

Checked pipe run? Sounds like it could be kinking when the tank gets put down restricting the flow.

[nige777]

um in and out pipes are good no kinks

[Streetmann]

It does sound like a breather issue quick test is to open the filler cap at the known problem times

[nige777]

thanks will have another look its a headache