A friend just got his guages on a 1992, and we did all the normal pump mods, but I can't remember the easiest way to get to the full power screw (it has been awhile since I touched mine). The cap is gone (from us) but what size, configuration do we need to loosen up the bolt so we can remove it and grind it down??I will have him mark it, so he dont go into it blind like I did.
Bottom line, what ize wrench to remove the locknut so we can back-out the full fuel screw????
I am away from my ride now, so I need the help from ya'll.
Thanks

 

13 mm and 6 mm.