Heres the desciption:
Used Pingel petcock to fit Japanese bikes.  Excellent condition, the mounting bracket holes are 44mm center to center, the fuel line size is 5/8" and the lever moves freely, but there is a cut in the wire mesh filter screen.
Thanks for any info.

Not sure about the bolt spacing...but...the fuel line size for the GS is 7mm. Typically 1/4" (6.4mm) and 5/16" (7.9mm) are used. A 5/8" line would be hugh.

thanks.